Linux817 shell:until,nfs,random
问题
[root@samba caozx26]# vim until1.sh
'[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ]
do
let i++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stt$i
fi
done
[root@samba caozx26]# ./until1.sh
useradd：用户“stu5”已存在
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
[root@samba caozx26]#
[root@samba rhome]# cat ss.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 122$i 122$i
let i++
if [ $i -ge 6 ];then
mkdir -p /rhome/ss$i
useradd -d /rhome/ss$i ss$i
fi
done[root@samba rhome]# ./ss.sh
useradd：无效的用户名“1221”
useradd：无效的用户名“1222”
useradd：无效的用户名“1223”
useradd：无效的用户名“1224”
useradd：无效的用户名“1225”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1226”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1227”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1228”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1229”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“12210”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。[root@samba rhome]# tail -10 /etc/passwd
stt8:x:10012:10018::/rhome/stt8:/bin/bash
stt9:x:10013:10019::/rhome/stt9:/bin/bash
stt10:x:10014:10020::/rhome/stt10:/bin/bash
stt11:x:10015:10021::/rhome/stt11:/bin/bash
ss6:x:10016:10022::/rhome/ss6:/bin/bash
ss7:x:10017:10023::/rhome/ss7:/bin/bash
ss8:x:10018:10024::/rhome/ss8:/bin/bash
ss9:x:10019:10025::/rhome/ss9:/bin/bash
ss10:x:10020:10026::/rhome/ss10:/bin/bash
ss11:x:10021:10027::/rhome/ss11:/bin/bash为什么会创建用户ss11
[root@samba /]# ls -l ll
lrwxrwxrwx 1 root root 4 8月 16 11:34 ll -> dir2
[root@samba /]# read -p "w" link
wll
[root@samba /]# if [ -e "readlink -f $link " ];then
> echo "ok"
> else
> echo “no”
> fi
“no”
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ -e $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi
[root@samba /]# ./judgedfl.sh
input link:ll
ll is a link
ll is useful
[root@samba /]# ./judgedfl.sh
input link:/rhome
/rhome is a link
/rhome is useful
[root@samba /]# ls
a3 etc run
aa3 home s2.sh
aa4 httpd-2.4.37 samba
aa5 httpd-2.4.37.tar.bz2 sbin
aa6 ifdfl.sh shell01
app ipping.sh shop
apr-1.5.2 judgedfl.sh srv
apr-1.5.2.tar.bz2 lib synatx.sh
apr-util-1.5.4.tar.bz2 lib64 sys
bin lk tmp
boot ll u01
cmake.sh media u02
dev mnt u1
dir1 mysql-5.6.31 u2
dir11 mysql-5.6.31.tar.gz u3
dir12 opt usr
dir13 proc ut2
dir2 rhome var
dir3 root
[root@samba /]# ./judgedfl.sh
input link:mnt
mnt is a link
mnt is useful
[root@samba /]#
[root@samba /]# ls
a3 etc run
aa3 home s2.sh
aa4 httpd-2.4.37 samba
aa5 httpd-2.4.37.tar.bz2 sbin
aa6 ifdfl.sh shell01
app ipping.sh shop
apr-1.5.2 judgedfl.sh srv
apr-1.5.2.tar.bz2 lib synatx.sh
apr-util-1.5.4.tar.bz2 lib64 sys
bin lk tmp
boot ll u01
cmake.sh media u02
dev mnt u1
dir1 mysql-5.6.31 u2
dir11 mysql-5.6.31.tar.gz u3
dir12 opt usr
dir13 proc ut2
dir2 rhome var
dir3 root
[root@samba /]# ./judgedfl.sh
input link:mnt
mnt is a link
mnt is useful
[root@samba /]# ls -l /mnt
总用量 696
-rw-r--r-- 3 root root 14 10月 30 2020 CentOS_BuildTag
drwxr-xr-x 3 root root 2048 10月 27 2020 EFI
-rw-rw-r-- 21 root root 227 8月 30 2017 EULA
-rw-rw-r-- 21 root root 18009 12月 10 2015 GPL
drwxr-xr-x 3 root root 2048 10月 27 2020 images
drwxr-xr-x 2 root root 2048 11月 3 2020 isolinux
drwxr-xr-x 2 root root 2048 10月 27 2020 LiveOS
drwxr-xr-x 2 root root 673792 11月 4 2020 Packages
drwxr-xr-x 2 root root 4096 11月 4 2020 repodata
-rw-rw-r-- 21 root root 1690 12月 10 2015 RPM-GPG-KEY-CentOS-7
-rw-rw-r-- 21 root root 1690 12月 10 2015 RPM-GPG-KEY-CentOS-Testing-7
-r--r--r-- 1 root root 2883 11月 4 2020 TRANS.TBL
[root@samba /]# ls -l ll
lrwxrwxrwx 1 root root 4 8月 16 11:34 ll -> dir2
[root@samba /]#
[root@samba /]# ./judgedfl.sh
input link:homw
[root@samba /]# ./judgedfl.sh
input link:home
home is a link
home is useful
[root@samba /]#
[root@samba /]# ./judgedfl.sh
input link:dir11
dir11 is a link
dir11 is useful
[root@samba /]#
[root@samba caozx26]# if [ -!e $link ];then
if [ -echo $link $link ];then
[root@nfs ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead)Docs: man:firewalld(1)
[root@nfs ~]# echo $?
3
[root@nfs ~]# cat /etc/selinux/config# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted[root@nfs ~]# cat /etc/selinux/config |tr 'enabled' 'disabled'# This fibl coitrobs thl ststl of SELiiux oi thl systlm.
# SELINUX= csi tskl oil of thlsl thrll vsbuls:
# liforciig - SELiiux slcurity pobicy is liforcle.
# plrmissivl - SELiiux priits wsriiigs iistlse of liforciig.
# eissable - No SELiiux pobicy is bosele.
SELINUX=eissable
# SELINUXTYPE= csi tskl oil of thrll vsbuls:
# tsrgltle - Tsrgltle proclssls srl protlctle,
# miiimum - Moeificstioi of tsrgltle pobicy. Oiby slblctle proclssls srl protlctle.
# mbs - Mubti Llvlb Slcurity protlctioi.
SELINUXTYPE=tsrgltle
[root@web ~]# echo $[$RANDOM%131]
42
您在 /var/spool/mail/root 中有邮件
[root@web ~]# echo $[$RANDOM%900+100]
392
[root@web ~]# tr [] [*] <lucky1.txt
139 7630
139 0185
139 0702
139 3305
139 5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr [ ] [*]<lucky1.txt
tr: 额外的操作数 "[*]"
Try 'tr --help' for more information.
[root@web ~]# tr [ ] ["*"]<lucky1.txt
tr: 额外的操作数 "[*]"
Try 'tr --help' for more information.
[root@web ~]# tr [ ] ‘*’ <lucky1.txt
tr: 额外的操作数 "‘*’"
Try 'tr --help' for more information.
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr ‘ ’ ‘*’ <lucky1.sh
-bash: lucky1.sh: 没有那个文件或目录
[root@web ~]# tr ‘ ’ ‘*’ <lucky1.txt
tr: 额外的操作数 "‘*’"[root@web ~]# tr ' ' '*' <lucky1.txt
139 7630
139 0185
139 0702
139 3305
139 5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]#
Try 'tr --help' for more information.
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr '\t' '****' < lucky1.txt
139*7630
139*0185
139*0702
139*3305
139*5098
您在 /var/spool/mail/root 中有邮件
shell
ntp同步
[root@samba caozx26]# cat nntp.sh
count=0
ntp_server=192.168.235.100
while true
do
ntpdate -u $ntp_server >/dev/null 2>&1
if [ $? -ne 0 ];then
echo "failed" | mail -s "f" root@samba.web.cn
else
let count++
if [ $((count%100)) -eq 0 ];then
echo “successfully” |mail -s "su" root@samba.web.cn && count=0
fi
fi
done
[root@samba caozx26]# ./nntp.sh
until user
[root@samba rhome]# cat s2.sh
i=1
until [ $i -gt 10 ]
do
if [ $i -le 5 ];then
useradd -u 199$i df$i
else
mkdir -p /rhome/199$i
useradd -d /rhome/199$i dfs$i
fi
let i++
done
[root@samba rhome]# chmod +x s2.sh
[root@samba rhome]# ./s2.sh
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
[root@samba rhome]# tail -19 /etc/passwd
l6:x:10022:10033::/rhome/l6:/bin/bash
k7:x:117:10034::/home/k7:/bin/bash
l7:x:10023:10035::/rhome/l7:/bin/bash
k8:x:118:10036::/home/k8:/bin/bash
l8:x:10024:10037::/rhome/l8:/bin/bash
k9:x:119:10038::/home/k9:/bin/bash
l9:x:10025:10039::/rhome/l9:/bin/bash
k10:x:1110:1110::/home/k10:/bin/bash
l10:x:10026:10040::/rhome/l10:/bin/bash
df1:x:1991:1991::/home/df1:/bin/bash
df2:x:1992:1992::/home/df2:/bin/bash
df3:x:1993:1993::/home/df3:/bin/bash
df4:x:1994:1994::/home/df4:/bin/bash
df5:x:1995:1995::/home/df5:/bin/bash
dfs6:x:10027:10041::/rhome/1996:/bin/bash
dfs7:x:10028:10042::/rhome/1997:/bin/bash
dfs8:x:10029:10043::/rhome/1998:/bin/bash
dfs9:x:10030:10044::/rhome/1999:/bin/bash
dfs10:x:10031:10045::/rhome/19910:/bin/bash
judge /tmp/run
[root@samba rhome]# cat judged.sh
find /tmp/run
if [ $? -eq 0 ];then
rm -rf /tmp/run/*
else
mkdir -p /tmp/run
fi[root@samba rhome]# chmod +x judged.sh
[root@samba rhome]# ./judged.sh
/tmp/run
judge document file link
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ ! -e $link ];then
echo "$link is not existed"
exit 1
fiif [ -d $link ];then
echo "$link is a document"
fiif [ -f $link ];then
echo "$link is a file"
fiif [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:home
home is a document
[root@samba /]# ./judgedfl.sh
input link:file11
file11 is not existed
[root@samba /]# ls
a3 etc run
aa3 home s2.sh
aa4 httpd-2.4.37 samba
aa5 httpd-2.4.37.tar.bz2 sbin
aa6 ifdfl.sh shell01
app ipping.sh shop
apr-1.5.2 judgedfl.sh srv
apr-1.5.2.tar.bz2 lib synatx.sh
apr-util-1.5.4.tar.bz2 lib64 sys
bin lk tmp
boot ll u01
cmake.sh media u02
dev mnt u1
dir1 mysql-5.6.31 u2
dir11 mysql-5.6.31.tar.gz u3
dir12 opt usr
dir13 proc ut2
dir2 rhome var
dir3 root
[root@samba /]# ./judgedfl.sh
input link:dir12
dir12 is a file
[root@samba /]# ./judgedfl.sh
input link:aa5
aa5 is a file
pingok mail
[root@samba /]# cat pingpo.sh
read -p "pl input a ip:" ip
ping -c1 -w1 $ip
if [ $? -ne 0 ];then
echo "server $ip is down"
echo "$ip no"|mail -s "$ip no" root@sambe.web.cn
else
echo "server $ip is up"
echo "$ip ok"|mail -s "$ip ok" root@sambe.web.cn
fi[root@samba /]# chmod +x pingpo.sh
[root@samba /]# ./pingpo.sh
pl input a ip:192.179.231.3
PING 192.179.231.3 (192.179.231.3) 56(84) bytes of data.--- 192.179.231.3 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 999msserver 192.179.231.3 is down
[root@samba /]# cat /var/spool/mail/root
From root@code.itcast.cn Thu May 15 19:32:19 2025
Return-Path: <root@code.itcast.cn>
X-Original-To: root
Delivered-To: root@code.itcast.cn
Received: by code.itcast.cn (Postfix, from userid 0)id 190B921C857D; Thu, 15 May 2025 19:32:19 +0800 (CST)
To: root@code.itcast.cn
From: code@code.itcast.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for code.itcast.cn ***
Message-Id: <20250515113219.190B921C857D@code.itcast.cn>
Date: Thu, 15 May 2025 19:32:19 +0800 (CST)
Status: ROcode.itcast.cn : May 15 19:32:18 : code : user NOT in sudoers ; TTY=pts/2 ; PWD=/home/code ; USER=root ; COMMAND=/bin/suFrom root@code.itcast.cn Thu May 15 22:04:16 2025
Return-Path: <root@code.itcast.cn>
X-Original-To: root
Delivered-To: root@code.itcast.cn
Received: by code.itcast.cn (Postfix, from userid 0)id 290BA21C8591; Thu, 15 May 2025 22:04:16 +0800 (CST)
To: root@code.itcast.cn
From: code@code.itcast.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for code.itcast.cn ***
Message-Id: <20250515140416.290BA21C8591@code.itcast.cn>
Date: Thu, 15 May 2025 22:04:16 +0800 (CST)
Status: ROcode.itcast.cn : May 15 22:04:16 : code : user NOT in sudoers ; TTY=pts/2 ; PWD=/home/code ; USER=root ; COMMAND=/bin/suFrom root@web.cn Sat Jun 21 11:51:59 2025
Return-Path: <root@web.cn>
X-Original-To: root
Delivered-To: root@web.cn
Received: by web.cn (Postfix, from userid 0)id 235A420446EA; Sat, 21 Jun 2025 11:51:59 +0800 (CST)
To: root@web.cn
From: code@web.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for web.cn ***
Message-Id: <20250621035159.235A420446EA@web.cn>
Date: Sat, 21 Jun 2025 11:51:59 +0800 (CST)
Status: Oweb.cn : Jun 21 11:51:59 : code : user NOT in sudoers ; TTY=pts/3 ; PWD=/hom e/code ; USER=root ; COMMAND=/bin/suFrom root@web.cn Sat Jun 21 20:25:14 2025
Return-Path: <root@web.cn>
X-Original-To: root
Delivered-To: root@web.cn
Received: by web.cn (Postfix, from userid 0)id 5E4F020446E9; Sat, 21 Jun 2025 20:25:14 +0800 (CST)
To: root@web.cn
From: code@web.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for web.cn ***
Message-Id: <20250621122514.5E4F020446E9@web.cn>
Date: Sat, 21 Jun 2025 20:25:14 +0800 (CST)
Status: Oweb.cn : Jun 21 20:25:14 : code : user NOT in sudoers ; TTY=pts/1 ; PWD=/hom e/code ; USER=root ; COMMAND=/bin/su
--5C41D2044E8A.1755402895/samba.web.cn
Content-Description: Delivery report
Content-Type: message/delivery-statusReporting-MTA: dns; samba.web.cn
X-Postfix-Queue-ID: 5C41D2044E8A
X-Postfix-Sender: rfc822; root@samba.web.cn
Arrival-Date: Sun, 17 Aug 2025 11:54:54 +0800 (CST)Final-Recipient: rfc822; root@sambe.web.cn
Action: failed
Status: 5.4.4
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service erro rfor name=sambe.web.cn type=AAAA: Host not found--5C41D2044E8A.1755402895/samba.web.cn
Content-Description: Undelivered Message
Content-Type: message/rfc822Return-Path: <root@samba.web.cn>
Received: by samba.web.cn (Postfix, from userid 0)id 5C41D2044E8A; Sun, 17 Aug 2025 11:54:54 +0800 (CST)
Date: Sun, 17 Aug 2025 11:54:54 +0800
To: root@sambe.web.cn
Subject: 192.179.231.3 no
User-Agent: Heirloom mailx 12.5 7/5/10
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <20250817035454.5C41D2044E8A@samba.web.cn>
From: root@samba.web.cn (root)192.179.231.3 no--5C41D2044E8A.1755402895/samba.web.cn--[root@samba /]# cat pingpo.sh
read -p "pl input a ip:" ip
ping -c1 -w1 $ip
if [ $? -ne 0 ];then
echo "server $ip is down"
echo "$ip no"|mail -s "$ip no" root@sambe.web.cn
else
echo "server $ip is up"
echo "$ip ok"|mail -s "$ip ok" root@sambe.web.cn
fi[root@samba /]# ./pingpo.sh
pl input a ip:192.168.235.254
PING 192.168.235.254 (192.168.235.254) 56(84) bytes of data.
64 bytes from 192.168.235.254: icmp_seq=1 ttl=128 time=0.744 ms--- 192.168.235.254 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.744/0.744/0.744/0.000 ms
server 192.168.235.254 is up
[root@samba /]# tail -10 /var/spool/mail/root
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <20250817040023.7969E2044E8B@samba.web.cn>
From: root@samba.web.cn (root)192.168.235.254 ok
program
[root@samba home]# cat program.sh
read -p "please input a synatx " jj
if [ -z $jj ];then
echo "usage:/home/program hello or world"
exit 1
fi
if [ $jj == hello ];then
echo "world"
fi
if [ $jj == world ];then
echo "hello"
fi
if [ $jj != hello ]&&[ $jj != world ];then
echo "usage:/home/program hello or world"
fi
[root@samba home]# chmod +x program.sh
[root@samba home]# ./program.sh
please input a synatx hell
usage:/home/program hello or world
[root@samba home]# ./program.sh
please input a synatx wo
usage:/home/program hello or world
[root@samba home]# ./program.sh
please input a synatx
usage:/home/program hello or world
[root@samba home]# ./program.sh
please input a synatx l;
usage:/home/program hello or world
NFS 搭建
[root@nfs ~]# cat nfs.sh
systemctl status firewalld >/dev/null 2>&1
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0 >/dev/null 2>&1
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config >/dev/null 2>&1
fi
rpm -qa | grep rpcbind >/dev/null 2>&1
if [ $? -ne 0 ];then
yum install rpcbind -y
fi
rpm -qa | grep nfs-utils>/dev/null 2>&1
if [ $? -ne 0 ];then
yum install nfs-utils -y
fi
cat /etc/exports |grep -v ^#
if [ $? -ne 0 ];then
echo "/share 192.168.235.0/24(rw,sync)" >>/etc/exports
fi
systemctl start rpcbind
systemctl start nfs-utils
ss -ntltp|grep 111
if [ $? -eq 0 ];then
echo "nfs has been started"
fi
[root@nfs ~]# ./nfs.sh
/share 192.168.235.0/24(rw,sync)
LISTEN 0 128 *:111 *:* users:(("rpcbind",pid=721,fd=8))
LISTEN 0 128 *:22 *:* users:(("sshd",pid=1115,fd=3))
LISTEN 0 128 [::]:111 [::]:* users:(("rpcbind",pid=721,fd=11))
LISTEN 0 32 [::]:21 [::]:* users:(("vsftpd",pid=1119,fd=4))
LISTEN 0 128 [::]:22 [::]:* users:(("sshd",pid=1115,fd=4))
nfs has been started
[root@nfs ~]#random phonenumber
[root@web ~]# cat num.sh
a=139
i=0
while [ $i -lt 1000 ]
do
echo $a$[$RANDOM%90000000+10000000]>>phonenum.txt
let i++
done
[root@web ~]# cat phonenum.txt
13910004559
13910029040
13910010475
13910000223
13910020228
13910009012lucky ad
[root@web ~]# cat luck.sh
cat phonenum.txt|sort -R|grep -A 5 num|grep -v ^“num.txt”>luvk.txt
cat luvk.txt|cut -c1-3 >he.txt
cat luvk.txt|cut -c8-11 >ta.txt
paste he.txt ta.txt > pa.txt
sed 's/[[:space:]]/****/g' pa.txt >luad.txt
[root@web ~]# ./luck.sh
您在 /var/spool/mail/root 中有邮件
[root@web ~]# cat luad.txt
139****3617
139****3525
139****7644
139****6141
139****4299记录
192.168.235.10
│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Sat Aug 16 22:32:34 2025 from 192.168.235.1
[code@samba ~]$ su - caozx26
密码：
上一次登录：六 8月 16 19:33:36 CST 2025pts/1 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# ntpdate -u 192.168.235.100
17 Aug 08:11:20 ntpdate[47238]: adjust time server 192.168.235.100 offset 0.000247 sec
[root@samba caozx26]# vim ntp.sh
[root@samba caozx26]# vim ntpdate.sh
[root@samba caozx26]# vim nntp.sh
[root@samba caozx26]# cat nntp.sh
count=0
ntp_server=192.168.235.100
while true
do
ntpdate -u $ntp_server >/dev/null 2>&1
if[ $? -ne 0 ];then
echo "failed" | mail -s "f" root@samba.web.cn
else
let count++
if [ $((count%100)) -eq 0 ];then
echo “successfully” |mail -s "su" root@samba.web.cn && count=0
fi
fi
done
[root@samba caozx26]# chmod +x nntp.sh
[root@samba caozx26]# ./nntp.sh
./nntp.sh:行6: 未预期的符号 `then' 附近有语法错误
./nntp.sh:行6: `if[ $? -ne 0 ];then'
[root@samba caozx26]# vim nntp.sh
[root@samba caozx26]# cat nntp.sh
count=0
ntp_server=192.168.235.100
while true
do
ntpdate -u $ntp_server >/dev/null 2>&1
if [ $? -ne 0 ];then
echo "failed" | mail -s "f" root@samba.web.cn
else
let count++
if [ $((count%100)) -eq 0 ];then
echo “successfully” |mail -s "su" root@samba.web.cn && count=0
fi
fi
done
[root@samba caozx26]# ./nntp.sh
^C[root@samba caozx26]# vim until1.sh
[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ];then
let count++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stu$i
fi
[root@samba caozx26]# chmod +x until1.sh
[root@samba caozx26]# ./until1.sh
./until1.sh:行2: 未预期的符号 `then' 附近有语法错误
./until1.sh:行2: `until [ $i -gt 10 ];then'
[root@samba caozx26]# vim until1.sh
[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ];then
do
let count++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stu$i
fi
done
[root@samba caozx26]# ./until1.snh
bash: ./until1.snh: 没有那个文件或目录
[root@samba caozx26]# ./until1.sh
./until1.sh:行2: 未预期的符号 `then' 附近有语法错误
./until1.sh:行2: `until [ $i -gt 10 ];then'
[root@samba caozx26]# vim until1.sh
[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ]
do
let count++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stu$i
fi
done
[root@samba caozx26]# ./until1.sh
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
useradd：用户“stu0”已存在
^C[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ]
do
let count++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stu$i
fi
done
[root@samba caozx26]# vim until1.sh
[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ]
do
let i++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stu$i
fi
done
[root@samba caozx26]# vim until1.sh
'[root@samba caozx26]# cat until1.sh
i=0
until [ $i -gt 10 ]
do
let i++
if [ $i -le 5 ];then
useradd -u 10$i stu$i
else
mkdir -p /rhome/stt$i
useradd -d /rhome/stt$i stt$i
fi
done
[root@samba caozx26]# ./until1.sh
useradd：用户“stu5”已存在
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
[root@samba caozx26]# ls /rhome/stt1
ls: 无法访问/rhome/stt1: 没有那个文件或目录
[root@samba caozx26]# cd /rhome
[root@samba rhome]# ls
stt10 stt6 stt8 stu10 stu7 stu9 stuu6 stuu8
stt11 stt7 stt9 stu6 stu8 stuu10 stuu7 stuu9
[root@samba rhome]# tail -5 /etc/passwd
stt7:x:10011:10017::/rhome/stt7:/bin/bash
stt8:x:10012:10018::/rhome/stt8:/bin/bash
stt9:x:10013:10019::/rhome/stt9:/bin/bash
stt10:x:10014:10020::/rhome/stt10:/bin/bash
stt11:x:10015:10021::/rhome/stt11:/bin/bash
[root@samba rhome]# vim ss.sh
[root@samba rhome]# cat ss.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 122$i 122$i
i++
if [ $i -ge 6 ];then
mkdir -p /rhome/ss$i
useradd -d /rhome/ss$i ss$i
fi
done[root@samba rhome]# chmod +x ss.sh
[root@samba rhome]# ./ss.sh
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
useradd：无效的用户名“1221”
./ss.sh:行5: i++: 未找到命令
^C[root@samba rhome]# cat ss.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 122$i 122$i
i++
if [ $i -ge 6 ];then
mkdir -p /rhome/ss$i
useradd -d /rhome/ss$i ss$i
fi
done[root@samba rhome]# vim ss.sh
[root@samba rhome]# cat ss.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 122$i 122$i
let i++
if [ $i -ge 6 ];then
mkdir -p /rhome/ss$i
useradd -d /rhome/ss$i ss$i
fi
done[root@samba rhome]# ./ss.sh
useradd：无效的用户名“1221”
useradd：无效的用户名“1222”
useradd：无效的用户名“1223”
useradd：无效的用户名“1224”
useradd：无效的用户名“1225”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1226”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1227”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1228”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“1229”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：无效的用户名“12210”
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
[root@samba rhome]# useradd 112
useradd：无效的用户名“112”
[root@samba rhome]# tail -5 /etc/passwd
ss7:x:10017:10023::/rhome/ss7:/bin/bash
ss8:x:10018:10024::/rhome/ss8:/bin/bash
ss9:x:10019:10025::/rhome/ss9:/bin/bash
ss10:x:10020:10026::/rhome/ss10:/bin/bash
ss11:x:10021:10027::/rhome/ss11:/bin/bash
[root@samba rhome]# vim ss.sh
[root@samba rhome]# cat ss.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 122$i r122$i
let i++
if [ $i -ge 6 ];then
useradd -d /rhome/ss$i ss$i
fi
done[root@samba rhome]# tail -10 /etc/passwwd
tail: 无法打开"/etc/passwwd" 读取数据: 没有那个文件或目录
[root@samba rhome]# tal -10 /etc/passwd
bash: tal: 未找到命令...
[root@samba rhome]# tail -10 /etc/passwd
stt8:x:10012:10018::/rhome/stt8:/bin/bash
stt9:x:10013:10019::/rhome/stt9:/bin/bash
stt10:x:10014:10020::/rhome/stt10:/bin/bash
stt11:x:10015:10021::/rhome/stt11:/bin/bash
ss6:x:10016:10022::/rhome/ss6:/bin/bash
ss7:x:10017:10023::/rhome/ss7:/bin/bash
ss8:x:10018:10024::/rhome/ss8:/bin/bash
ss9:x:10019:10025::/rhome/ss9:/bin/bash
ss10:x:10020:10026::/rhome/ss10:/bin/bash
ss11:x:10021:10027::/rhome/ss11:/bin/bash
[root@samba rhome]# vim s1.sh
[root@samba rhome]# cat s1.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 11$i k$i
if [ $i -gt 5 ];then
mkdir -p /rhome/l$i
useradd -d /rhome/l$i l$i
fi
i++
done[root@samba rhome]# chmod +x s1.sh
[root@samba rhome]# ./s1.sh
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
useradd：用户“k1”已存在
./s1.sh:行9: i++: 未找到命令
^C[root@samba rhome]# vim s1.sh
[root@samba rhome]# cat s1.sh
i=1
until [ $i -gt 10 ]
do
useradd -u 11$i k$i
if [ $i -gt 5 ];then
mkdir -p /rhome/l$i
useradd -d /rhome/l$i l$i
fi
let i++
done[root@samba rhome]# ./s1.sh
useradd：用户“k1”已存在
useradd：UID 113 并不唯一
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
[root@samba rhome]# tail -20 /etc/passwd
ss6:x:10016:10022::/rhome/ss6:/bin/bash
ss7:x:10017:10023::/rhome/ss7:/bin/bash
ss8:x:10018:10024::/rhome/ss8:/bin/bash
ss9:x:10019:10025::/rhome/ss9:/bin/bash
ss10:x:10020:10026::/rhome/ss10:/bin/bash
ss11:x:10021:10027::/rhome/ss11:/bin/bash
k1:x:111:10028::/home/k1:/bin/bash
k2:x:112:10029::/home/k2:/bin/bash
k4:x:114:10030::/home/k4:/bin/bash
k5:x:115:10031::/home/k5:/bin/bash
k6:x:116:10032::/home/k6:/bin/bash
l6:x:10022:10033::/rhome/l6:/bin/bash
k7:x:117:10034::/home/k7:/bin/bash
l7:x:10023:10035::/rhome/l7:/bin/bash
k8:x:118:10036::/home/k8:/bin/bash
l8:x:10024:10037::/rhome/l8:/bin/bash
k9:x:119:10038::/home/k9:/bin/bash
l9:x:10025:10039::/rhome/l9:/bin/bash
k10:x:1110:1110::/home/k10:/bin/bash
l10:x:10026:10040::/rhome/l10:/bin/bash
[root@samba rhome]# vim s2.sh
[root@samba rhome]# cat s2.sh
i=1
until [ $i -gt 10 ]
do
if [ $i -le 5 ];then
useradd -u 199$i df$i
else
mkdir -p /rhome/199$i
useradd -d /rhome/199$i dfs$i
fi
let i++
done
[root@samba rhome]# chmod +x s2.sh
[root@samba rhome]# ./s2.sh
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
useradd：警告：此主目录已经存在。
不从 skel 目录里向其中复制任何文件。
[root@samba rhome]# tail -19 /etc/passwd
l6:x:10022:10033::/rhome/l6:/bin/bash
k7:x:117:10034::/home/k7:/bin/bash
l7:x:10023:10035::/rhome/l7:/bin/bash
k8:x:118:10036::/home/k8:/bin/bash
l8:x:10024:10037::/rhome/l8:/bin/bash
k9:x:119:10038::/home/k9:/bin/bash
l9:x:10025:10039::/rhome/l9:/bin/bash
k10:x:1110:1110::/home/k10:/bin/bash
l10:x:10026:10040::/rhome/l10:/bin/bash
df1:x:1991:1991::/home/df1:/bin/bash
df2:x:1992:1992::/home/df2:/bin/bash
df3:x:1993:1993::/home/df3:/bin/bash
df4:x:1994:1994::/home/df4:/bin/bash
df5:x:1995:1995::/home/df5:/bin/bash
dfs6:x:10027:10041::/rhome/1996:/bin/bash
dfs7:x:10028:10042::/rhome/1997:/bin/bash
dfs8:x:10029:10043::/rhome/1998:/bin/bash
dfs9:x:10030:10044::/rhome/1999:/bin/bash
dfs10:x:10031:10045::/rhome/19910:/bin/bash
[root@samba rhome]# find /tmp/run
/tmp/run
[root@samba rhome]# echo[root@samba rhome]# find /tmp/run
/tmp/run
[root@samba rhome]# echo $?
0
[root@samba rhome]# find /tmp/l
find: ‘/tmp/l’: 没有那个文件或目录
[root@samba rhome]# echo $?
1
[root@samba rhome]# vim judged.sh
[root@samba rhome]# cat judged.sh
find /tmp/run
if [ $? -eq 0 ];then
rm -rf /tmp/run/*
else
mkdir -p /tmp/run
fi[root@samba rhome]# chmod +x judged.sh
[root@samba rhome]# ./judged.sh
/tmp/run
[root@samba rhome]# vim judgefdl.sh
[root@samba rhome]# cat judgefdl.sh
read -p "pl input link:" link
if [ -e $link ];then
if [ -e "readlink -f $link"]
[root@samba rhome]# read -p "ee" link
ee/rhome
[root@samba rhome]# if [ -e "readlink -f $link" ];then
> echo "ok"
> else
> echo "no"
> fi
no
[root@samba rhome]# ls
19910 1999 l6 s1.sh ss6 ss.sh stt7 stu6 stuu10 stuu9
1996 judged.sh l7 s2.sh ss7 stt10 stt8 stu7 stuu6
1997 judgefdl.sh l8 ss10 ss8 stt11 stt9 stu8 stuu7
1998 l10 l9 ss11 ss9 stt6 stu10 stu9 stuu8
[root@samba rhome]# cd .
[root@samba rhome]# ls
19910 1999 l6 s1.sh ss6 ss.sh stt7 stu6 stuu10 stuu9
1996 judged.sh l7 s2.sh ss7 stt10 stt8 stu7 stuu6
1997 judgefdl.sh l8 ss10 ss8 stt11 stt9 stu8 stuu7
1998 l10 l9 ss11 ss9 stt6 stu10 stu9 stuu8
[root@samba rhome]# cd /
[root@samba /]# ls
a3 cmake.sh httpd-2.4.37.tar.bz2 opt sys
aa3 dev ifdfl.sh proc tmp
aa4 dir1 ipping.sh rhome u01
aa5 dir11 lib root u02
aa6 dir12 lib64 run u1
app dir13 lk samba u2
apr-1.5.2 dir2 ll sbin u3
apr-1.5.2.tar.bz2 dir3 media shell01 usr
apr-util-1.5.4.tar.bz2 etc mnt shop ut2
bin home mysql-5.6.31 srv var
boot httpd-2.4.37 mysql-5.6.31.tar.gz synatx.sh
[root@samba /]# if [ -e "readlink -f $link" ];then
> echo "ok"
> else
> echo "no"
> fi
no
[root@samba /]# link=ll
[root@samba /]# if [ -e "readlink -f $link" ];then
> echo "ok"
> else
> echo "no"
> fi
no
[root@samba /]# ls -l ll
lrwxrwxrwx 1 root root 4 8月 16 11:34 ll -> dir2
[root@samba /]# read -p "w" link
wll
[root@samba /]# if [ -e "readlink -f $link " ];then
> echo "ok"
> else
> echo “no”
> fi
“no”
[root@samba /]# vim s2.sh
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link" link
if [ -e $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
[root@samba /]# chmod +x judgedfl.sh
[root@samba /]# ./judgedfl.sh
input linkll
./judgedfl.sh:行9: 语法错误: 未预期的文件结尾
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ -e $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi
[root@samba /]# ./judgedfl.sh
input link:ll
ll is a link
ll is useful
[root@samba /]# ./judgedfl.sh
input link:/rhome
/rhome is a link
/rhome is useful
[root@samba /]# ls
a3 etc run
aa3 home s2.sh
aa4 httpd-2.4.37 samba
aa5 httpd-2.4.37.tar.bz2 sbin
aa6 ifdfl.sh shell01
app ipping.sh shop
apr-1.5.2 judgedfl.sh srv
apr-1.5.2.tar.bz2 lib synatx.sh
apr-util-1.5.4.tar.bz2 lib64 sys
bin lk tmp
boot ll u01
cmake.sh media u02
dev mnt u1
dir1 mysql-5.6.31 u2
dir11 mysql-5.6.31.tar.gz u3
dir12 opt usr
dir13 proc ut2
dir2 rhome var
dir3 root
[root@samba /]# ./judgedfl.sh
input link:mnt
mnt is a link
mnt is useful
[root@samba /]# ls -l /mnt
总用量 696
-rw-r--r-- 3 root root 14 10月 30 2020 CentOS_BuildTag
drwxr-xr-x 3 root root 2048 10月 27 2020 EFI
-rw-rw-r-- 21 root root 227 8月 30 2017 EULA
-rw-rw-r-- 21 root root 18009 12月 10 2015 GPL
drwxr-xr-x 3 root root 2048 10月 27 2020 images
drwxr-xr-x 2 root root 2048 11月 3 2020 isolinux
drwxr-xr-x 2 root root 2048 10月 27 2020 LiveOS
drwxr-xr-x 2 root root 673792 11月 4 2020 Packages
drwxr-xr-x 2 root root 4096 11月 4 2020 repodata
-rw-rw-r-- 21 root root 1690 12月 10 2015 RPM-GPG-KEY-CentOS-7
-rw-rw-r-- 21 root root 1690 12月 10 2015 RPM-GPG-KEY-CentOS-Testing-7
-r--r--r-- 1 root root 2883 11月 4 2020 TRANS.TBL
[root@samba /]# ls -l ll
lrwxrwxrwx 1 root root 4 8月 16 11:34 ll -> dir2
[root@samba /]#
[root@samba /]# ./judgedfl.sh
input link:homw
[root@samba /]# ./judgedfl.sh
input link:home
home is a link
home is useful
[root@samba /]# ./judgedfl.sh
input link:dir11
dir11 is a link
dir11 is useful
[root@samba /]# ./judgedfl.sh
input link:home
home is a link
home is useful
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ -ne $link ];then
echo "$link is useless"
exit 1
fi
if [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:hos
./judgedfl.sh: 第 2 行:[: -ne: 期待一元表达式
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ -e $link ];then
echo "$link is useless"
exit 1
fi
if [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ -e $link ] && [ $? -ne 0 ];then
echo "$link useless"
exit 1
fi
if [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:hks
[root@samba /]# echo $link
ll
[root@samba /]# link=nks
[root@samba /]# echo $nks[root@samba /]# echo $?
0
[root@samba /]# echo $link
nks
[root@samba /]# if [ -e $link ];then
> echo "ok"
> else echo "no" fi
> fi
no fi
[root@samba /]# if [ -e $link ]&&[ $? -ne 0 ];then
> echo "wrong"
> exit 1
> fi
[root@samba /]# if [ -e $link ]&&[ $? -ne 0 ];then
> echo "wrong"
> fi
[root@samba /]# echo $link
nks
[root@samba /]# if [ -e $link ];then
> echo "ok"
> else echo "wrong"
> exit 1
> fi
wrong
exit
[caozx26@samba ~]$ if [ !e $link ];then
if [ exit $link ];then
> echo wrong
> exit 1
> fi
wrong
登出
[code@samba ~]$ su -caozx26
密码：
su: 鉴定故障
[code@samba ~]$ su - caozx26
密码：
上一次登录：日 8月 17 08:08:58 CST 2025pts/4 上
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# if [ -!e $link ];then
if [ -echo $link $link ];then
> echo ^C
[root@samba caozx26]# if [ ! -e $link ];then
> echo "wrong"
> exit 1
> fi
[root@samba caozx26]# echo $link[root@samba caozx26]# link=lkl
[root@samba caozx26]# if [ ! -e $link ];then
> echo "wrong"
> exit 1
> fi
wrong
exit
[caozx26@samba ~]$ sudo su
[sudo] caozx26 的密码：
[root@samba caozx26]# ls
app km nntp.sh ntp.sh utilc.sh 视频 下载
find.sh l2 ntp1.sh until1.sh 公共 图片 音乐
inotify.sh ll ntpdate.sh until.sh 模板 文档 桌面
[root@samba caozx26]# cd /
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ ! -e $link ] ;then
echo "$link useless"
exit 1
fi
if [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:sda
sda useless
[root@samba /]# ./judgedfl.sh
input link:home
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ ! -e $link ] ;then
echo "$link is out of efficient"
exit 1
fi
if [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:add
add is out of efficient
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ ! -e $link ] ;then
echo "$link is not existed"
exit 1
fi
if [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:dasd
dasd is not existed
[root@samba /]# ./judgedfl.sh
input link:ll
ll is a link
ll is useful
[root@samba /]# vim judgedfl.sh
[root@samba /]# cat judgedfl.sh
read -p "input link:" link
if [ ! -e $link ];then
echo "$link is not existed"
exit 1
fiif [ -d $link ];then
echo "$link is a document"
fiif [ -f $link ];then
echo "$link is a file"
fiif [ -L $link ];then
echo "$link is a link"
if [ -e $(readlink -f $link) ];then
echo "$link is useful"
else
echo "$link is useless"
fi
fi[root@samba /]# ./judgedfl.sh
input link:home
home is a document
[root@samba /]# ./judgedfl.sh
input link:file11
file11 is not existed
[root@samba /]# ls
a3 etc run
aa3 home s2.sh
aa4 httpd-2.4.37 samba
aa5 httpd-2.4.37.tar.bz2 sbin
aa6 ifdfl.sh shell01
app ipping.sh shop
apr-1.5.2 judgedfl.sh srv
apr-1.5.2.tar.bz2 lib synatx.sh
apr-util-1.5.4.tar.bz2 lib64 sys
bin lk tmp
boot ll u01
cmake.sh media u02
dev mnt u1
dir1 mysql-5.6.31 u2
dir11 mysql-5.6.31.tar.gz u3
dir12 opt usr
dir13 proc ut2
dir2 rhome var
dir3 root
[root@samba /]# ./judgedfl.sh
input link:dir12
dir12 is a file
[root@samba /]# ./judgedfl.sh
input link:aa5
aa5 is a file
[root@samba /]# vim pingpo.sh
[root@samba /]# cat pingpo.sh
read -p "pl input a ip:" ip
ping -c1 -w1 $ip
if [ $? -ne 0 ];then
echo "server $ip is down"
echo "$ip no"|mail -s "$ip no" root@sambe.web.cn
else
echo "server $ip is up"
echo "$ip ok"|mail -s "$ip ok" root@sambe.web.cn
fi[root@samba /]# chmod +x pingpo.sh
[root@samba /]# ./pingpo.sh
pl input a ip:192.179.231.3
PING 192.179.231.3 (192.179.231.3) 56(84) bytes of data.--- 192.179.231.3 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 999msserver 192.179.231.3 is down
[root@samba /]# cat /var/spool/mail/root
From root@code.itcast.cn Thu May 15 19:32:19 2025
Return-Path: <root@code.itcast.cn>
X-Original-To: root
Delivered-To: root@code.itcast.cn
Received: by code.itcast.cn (Postfix, from userid 0)id 190B921C857D; Thu, 15 May 2025 19:32:19 +0800 (CST)
To: root@code.itcast.cn
From: code@code.itcast.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for code.itcast.cn ***
Message-Id: <20250515113219.190B921C857D@code.itcast.cn>
Date: Thu, 15 May 2025 19:32:19 +0800 (CST)
Status: ROcode.itcast.cn : May 15 19:32:18 : code : user NOT in sudoers ; TTY=pts/2 ; PWD=/home/code ; USER=root ; COMMAND=/bin/suFrom root@code.itcast.cn Thu May 15 22:04:16 2025
Return-Path: <root@code.itcast.cn>
X-Original-To: root
Delivered-To: root@code.itcast.cn
Received: by code.itcast.cn (Postfix, from userid 0)id 290BA21C8591; Thu, 15 May 2025 22:04:16 +0800 (CST)
To: root@code.itcast.cn
From: code@code.itcast.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for code.itcast.cn ***
Message-Id: <20250515140416.290BA21C8591@code.itcast.cn>
Date: Thu, 15 May 2025 22:04:16 +0800 (CST)
Status: ROcode.itcast.cn : May 15 22:04:16 : code : user NOT in sudoers ; TTY=pts/2 ; PWD=/home/code ; USER=root ; COMMAND=/bin/suFrom root@web.cn Sat Jun 21 11:51:59 2025
Return-Path: <root@web.cn>
X-Original-To: root
Delivered-To: root@web.cn
Received: by web.cn (Postfix, from userid 0)id 235A420446EA; Sat, 21 Jun 2025 11:51:59 +0800 (CST)
To: root@web.cn
From: code@web.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for web.cn ***
Message-Id: <20250621035159.235A420446EA@web.cn>
Date: Sat, 21 Jun 2025 11:51:59 +0800 (CST)
Status: Oweb.cn : Jun 21 11:51:59 : code : user NOT in sudoers ; TTY=pts/3 ; PWD=/hom e/code ; USER=root ; COMMAND=/bin/suFrom root@web.cn Sat Jun 21 20:25:14 2025
Return-Path: <root@web.cn>
X-Original-To: root
Delivered-To: root@web.cn
Received: by web.cn (Postfix, from userid 0)id 5E4F020446E9; Sat, 21 Jun 2025 20:25:14 +0800 (CST)
To: root@web.cn
From: code@web.cn
Auto-Submitted: auto-generated
Subject: *** SECURITY information for web.cn ***
Message-Id: <20250621122514.5E4F020446E9@web.cn>
Date: Sat, 21 Jun 2025 20:25:14 +0800 (CST)
Status: Oweb.cn : Jun 21 20:25:14 : code : user NOT in sudoers ; TTY=pts/1 ; PWD=/hom e/code ; USER=root ; COMMAND=/bin/su
--5C41D2044E8A.1755402895/samba.web.cn
Content-Description: Delivery report
Content-Type: message/delivery-statusReporting-MTA: dns; samba.web.cn
X-Postfix-Queue-ID: 5C41D2044E8A
X-Postfix-Sender: rfc822; root@samba.web.cn
Arrival-Date: Sun, 17 Aug 2025 11:54:54 +0800 (CST)Final-Recipient: rfc822; root@sambe.web.cn
Action: failed
Status: 5.4.4
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service erro rfor name=sambe.web.cn type=AAAA: Host not found--5C41D2044E8A.1755402895/samba.web.cn
Content-Description: Undelivered Message
Content-Type: message/rfc822Return-Path: <root@samba.web.cn>
Received: by samba.web.cn (Postfix, from userid 0)id 5C41D2044E8A; Sun, 17 Aug 2025 11:54:54 +0800 (CST)
Date: Sun, 17 Aug 2025 11:54:54 +0800
To: root@sambe.web.cn
Subject: 192.179.231.3 no
User-Agent: Heirloom mailx 12.5 7/5/10
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <20250817035454.5C41D2044E8A@samba.web.cn>
From: root@samba.web.cn (root)192.179.231.3 no--5C41D2044E8A.1755402895/samba.web.cn--[root@samba /]# cat pingpo.sh
read -p "pl input a ip:" ip
ping -c1 -w1 $ip
if [ $? -ne 0 ];then
echo "server $ip is down"
echo "$ip no"|mail -s "$ip no" root@sambe.web.cn
else
echo "server $ip is up"
echo "$ip ok"|mail -s "$ip ok" root@sambe.web.cn
fi[root@samba /]# ./pingpo.sh
pl input a ip:192.168.235.254
PING 192.168.235.254 (192.168.235.254) 56(84) bytes of data.
64 bytes from 192.168.235.254: icmp_seq=1 ttl=128 time=0.744 ms--- 192.168.235.254 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.744/0.744/0.744/0.000 ms
server 192.168.235.254 is up
[root@samba /]# tail -10 /var/spool/mail/root
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <20250817040023.7969E2044E8B@samba.web.cn>
From: root@samba.web.cn (root)192.168.235.254 ok--7969E2044E8B.1755403224/samba.web.cn--[root@samba /]# cd /home
[root@samba home]# ls
caozx26 df3 k10 k6 stu0 stu4 stuu2 stuu6 u01 u05
code df4 k2 k7 stu1 stu5 stuu3 stuu7 u02 user01
df1 df5 k4 k8 stu2 stuu1 stuu4 stuu8 u03
df2 k1 k5 k9 stu3 stuu10 stuu5 stuu9 u04
[root@samba home]# vim program.sh
[root@samba home]# cat program.sh
read -p "please input a synatx " jj
if [ -z $jj ];then
echo "usage:/home/program hello or world"
exit 1
fi
if [ $jj == hello ];then
echo "world"
fi
if [ $jj == world ];then
echo "hello"
fi
if [ $jj != hello ]&&[ $jj != world ];then
echo "usage:/home/program hello or world"
fi
[root@samba home]# chmod +x program.sh
[root@samba home]# ./program.sh
please input a synatx hell
usage:/home/program hello or world
[root@samba home]# ./program.sh
please input a synatx wo
usage:/home/program hello or world
[root@samba home]# ./program.sh
please input a synatx
usage:/home/program hello or world
[root@samba home]# ./program.sh
please input a synatx l;
usage:/home/program hello or world
[root@samba home]#
Network error: Software caused connection abort───────────────────────────────────────────────────────────────────────────────Session stopped- Press <Return> to exit tab- Press R to restart session- Press S to save terminal output to file┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to code@192.168.235.10 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Sun Aug 17 08:05:10 2025 from 192.168.235.1
[code@samba ~]
192.168.235.3
┌──────────────────────────────────────────────────────────────────────┐│ • MobaXterm Personal Edition v23.2 • ││ (SSH client, X server and network tools) ││ ││ ⮞ SSH session to root@192.168.235.3 ││ • Direct SSH : ✓ ││ • SSH compression : ✓ ││ • SSH-browser : ✓ ││ • X11-forwarding : ✓ (remote display is forwarded through SSH) ││ ││ ⮞ For more info, ctrl+click on help or visit our website. │└──────────────────────────────────────────────────────────────────────┘Last login: Fri Jul 25 20:51:26 2025 from 192.168.235.1
[root@nfs ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead)Docs: man:firewalld(1)
[root@nfs ~]# echo $?
3
[root@nfs ~]# cat /etc/selinux/config# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted[root@nfs ~]# setenforce 0
setenforce: SELinux is disabled
[root@nfs ~]# echo $?
1
[root@nfs ~]# yum repoliar
已加载插件：fastestmirror, langpacks
没有该命令：repoliar。请使用 /usr/bin/yum --help
[root@nfs ~]# yum repolist
已加载插件：fastestmirror, langpacks
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
Determining fastest mirrors* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
源标识 源名称 状态
!base/7/x86_64 CentOS-7 - Base - mirrors.aliyun.com 10,072
!epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 13,791
!extras/7/x86_64 CentOS-7 - Extras - mirrors.aliyun.com 526
!updates/7/x86_64 CentOS-7 - Updates - mirrors.aliyun.com 6,173
repolist: 30,562
[root@nfs ~]# yum repolist
已加载插件：fastestmirror, langpacks
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
源标识 源名称 状态
!base/7/x86_64 CentOS-7 - Base - mirrors.aliyun.com 10,072
!epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 13,791
!extras/7/x86_64 CentOS-7 - Extras - mirrors.aliyun.com 526
!updates/7/x86_64 CentOS-7 - Updates - mirrors.aliyun.com 6,173
repolist: 30,562
[root@nfs ~]# yum install nfs
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
base | 3.6 kB 00:00:00
epel | 4.3 kB 00:00:00
extras | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
没有可用软件包 nfs。
错误：无须任何处理
[root@nfs ~]# yum install npcbind
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
没有可用软件包 npcbind。
错误：无须任何处理
[root@nfs ~]# rpm -ql |grep rpcbind
rpm：未给出要查询的参数
[root@nfs ~]# rpm -qa |grep rpcbind
rpcbind-0.2.0-49.el7.x86_64
[root@nfs ~]# rpm -q rpcbind
rpcbind-0.2.0-49.el7.x86_64
[root@nfs ~]# rpm -qa nfs-utils
nfs-utils-1.3.0-0.68.el7.2.x86_64
[root@nfs ~]# echo $?
0
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq ]
[root@nfs ~]# systemctl start firewalld
[root@nfs ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: active (running) since 日 2025-08-17 16:01:03 CST; 6s agoDocs: man:firewalld(1)Main PID: 65426 (firewalld)Tasks: 2CGroup: /system.slice/firewalld.service└─65426 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid8月 17 16:01:02 nfs.cn systemd[1]: Starting firewalld - dynamic firewall daemon...
8月 17 16:01:03 nfs.cn systemd[1]: Started firewalld - dynamic firewall daemon.
8月 17 16:01:04 nfs.cn firewalld[65426]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configura...t now.
Hint: Some lines were ellipsized, use -l to show in full.
[root@nfs ~]# echo $?
0
[root@nfs ~]# systemctl stop firewalld
[root@nfs ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead)Docs: man:firewalld(1)8月 17 16:01:02 nfs.cn systemd[1]: Starting firewalld - dynamic firewall daemon...
8月 17 16:01:03 nfs.cn systemd[1]: Started firewalld - dynamic firewall daemon.
8月 17 16:01:04 nfs.cn firewalld[65426]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configura...t now.
8月 17 16:01:37 nfs.cn systemd[1]: Stopping firewalld - dynamic firewall daemon...
8月 17 16:01:38 nfs.cn systemd[1]: Stopped firewalld - dynamic firewall daemon.
Hint: Some lines were ellipsized, use -l to show in full.
[root@nfs ~]# echo $?
3
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# setenforce 0
setenforce: SELinux is disabled
[root@nfs ~]# echo $?
1
[root@nfs ~]# cat /etc/selinux/config# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted[root@nfs ~]# ls /etc/selinux/config
/etc/selinux/config
[root@nfs ~]# cat /etc/selinux/config# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted[root@nfs ~]# cat /etc/selinux/config |tr 'enabled' 'disabled'# This fibl coitrobs thl ststl of SELiiux oi thl systlm.
# SELINUX= csi tskl oil of thlsl thrll vsbuls:
# liforciig - SELiiux slcurity pobicy is liforcle.
# plrmissivl - SELiiux priits wsriiigs iistlse of liforciig.
# eissable - No SELiiux pobicy is bosele.
SELINUX=eissable
# SELINUXTYPE= csi tskl oil of thrll vsbuls:
# tsrgltle - Tsrgltle proclssls srl protlctle,
# miiimum - Moeificstioi of tsrgltle pobicy. Oiby slblctle proclssls srl protlctle.
# mbs - Mubti Llvlb Slcurity protlctioi.
SELINUXTYPE=tsrgltle[root@nfs ~]# vim /etc/selinux/config
[root@nfs ~]# sed 's/enabled/disabled/g' /etc/selinux/config# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0
if [ $? -eq 0 ];then[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config
fi
rpm -ql |grep rpcbind
if [ $? -eq 0 ];then[root@nfs ~]# rpm -ql|grep rpcbind
rpm：未给出要查询的参数
[root@nfs ~]# rpm -ql |grep rpcbind
rpm：未给出要查询的参数
[root@nfs ~]# rpm -qa | grep rpcbind
rpcbind-0.2.0-49.el7.x86_64
[root@nfs ~]# rpm -ql | grep rpcbind
rpm：未给出要查询的参数
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# rpm -qa | grep rpcbind
rpcbind-0.2.0-49.el7.x86_64
ech[root@nfs ~]# echo $?
0
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config
fi
rpm -qa | grep rpcbind
if [ $? -ne 0 ];then
yum install rpcbind -y
fi
rpm -qa | grep nfs-utils
if [ $? -ne 0 ];then
yum install nfs-utils -y
fi
[root@nfs ~]# rpm -qa | grep nfs-utils
nfs-utils-1.3.0-0.68.el7.2.x86_64
[root@nfs ~]# echo $?
0
[root@nfs ~]# cat /etc/exports
/share 192.168.235.0/24(rw,sync)
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat /etc/exports |grep -v ^#
/share 192.168.235.0/24(rw,sync)
[root@nfs ~]# echo $?
0
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config
fi
rpm -qa | grep rpcbind
if [ $? -ne 0 ];then
yum install rpcbind -y
fi
rpm -qa | grep nfs-utils
if [ $? -ne 0 ];then
yum install nfs-utils -y
fi
cat /etc/exports |grep -v ^#
if [ $? -ne 0 ];then
echo /share 192.168.235.0/24(rw,sync) >>/etc/exports
fi
systemctl start rpcbind
systemctl start nfs-utils
ss -ntltp|grep 111
if [ $? -eq 0 ];then
echo "nfs has been started"
fi
[root@nfs ~]# chmod +x nfs.sh
[root@nfs ~]# ./nfs.sh
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead)Docs: man:firewalld(1)8月 17 16:01:02 nfs.cn systemd[1]: Starting firewalld - dynamic firewall daemon...
8月 17 16:01:03 nfs.cn systemd[1]: Started firewalld - dynamic firewall daemon.
8月 17 16:01:04 nfs.cn firewalld[65426]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configura...t now.
8月 17 16:01:37 nfs.cn systemd[1]: Stopping firewalld - dynamic firewall daemon...
8月 17 16:01:38 nfs.cn systemd[1]: Stopped firewalld - dynamic firewall daemon.
Hint: Some lines were ellipsized, use -l to show in full.
setenforce: SELinux is disabled# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targetedrpcbind-0.2.0-49.el7.x86_64
nfs-utils-1.3.0-0.68.el7.2.x86_64
/share 192.168.235.0/24(rw,sync)
./nfs.sh:行20: 未预期的符号 `(' 附近有语法错误
./nfs.sh:行20: `echo /share 192.168.235.0/24(rw,sync) >>/etc/exports'
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config
fi
rpm -qa | grep rpcbind
if [ $? -ne 0 ];then
yum install rpcbind -y
fi
rpm -qa | grep nfs-utils
if [ $? -ne 0 ];then
yum install nfs-utils -y
fi
cat /etc/exports |grep -v ^#
if [ $? -ne 0 ];then
echo "/share 192.168.235.0/24(rw,sync)" >>/etc/exports
fi
systemctl start rpcbind
systemctl start nfs-utils
ss -ntltp|grep 111
if [ $? -eq 0 ];then
echo "nfs has been started"
fi
[root@nfs ~]# setenforce 0 >>/dev/null 2>&1
[root@nfs ~]# echo $?
1
[root@nfs ~]# rpm -qa |grep rpcbind >/dev/null 2>&1
[root@nfs ~]# echo $?
0
[root@nfs ~]# vim nfs.sh[已修改但尚未保存]
/bin/bash: q: 未找到命令Shell 已返回127请按 ENTER 或其它命令继续
[root@nfs ~]# cat nfs.sh
systemctl status firewalld
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0 >/dev/null 2>&1
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config
fi
rpm -qa | grep rpcbind >/dev/null 2>&1
if [ $? -ne 0 ];then
yum install rpcbind -y
fi
rpm -qa | grep nfs-utils>/dev/null 2>&1
if [ $? -ne 0 ];then
yum install nfs-utils -y
fi
cat /etc/exports |grep -v ^#
if [ $? -ne 0 ];then
echo "/share 192.168.235.0/24(rw,sync)" >>/etc/exports
fi
systemctl start rpcbind
systemctl start nfs-utils
ss -ntltp|grep 111
if [ $? -eq 0 ];then
echo "nfs has been started"
fi
[root@nfs ~]# ./nfs.sh
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead)Docs: man:firewalld(1)8月 17 16:01:02 nfs.cn systemd[1]: Starting firewalld - dynamic firewall daemon...
8月 17 16:01:03 nfs.cn systemd[1]: Started firewalld - dynamic firewall daemon.
8月 17 16:01:04 nfs.cn firewalld[65426]: WARNING: AllowZoneDrifting is enabled. This is considered an insecure configura...t now.
8月 17 16:01:37 nfs.cn systemd[1]: Stopping firewalld - dynamic firewall daemon...
8月 17 16:01:38 nfs.cn systemd[1]: Stopped firewalld - dynamic firewall daemon.
Hint: Some lines were ellipsized, use -l to show in full.# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted/share 192.168.235.0/24(rw,sync)
LISTEN 0 128 *:111 *:* users:(("rpcbind",pid=721,fd=8))
LISTEN 0 128 *:22 *:* users:(("sshd",pid=1115,fd=3))
LISTEN 0 128 [::]:111 [::]:* users:(("rpcbind",pid=721,fd=11))
LISTEN 0 32 [::]:21 [::]:* users:(("vsftpd",pid=1119,fd=4))
LISTEN 0 128 [::]:22 [::]:* users:(("sshd",pid=1115,fd=4))
nfs has been started
[root@nfs ~]# vim nfs.sh
[root@nfs ~]# cat nfs.sh
systemctl status firewalld >/dev/null 2>&1
if [ $? -eq 0 ];then
systemctl stop firewalld
systemctl disable firewalld
fi
setenforce 0 >/dev/null 2>&1
if [ $? -eq 1 ];then
sed 's/enabled/disabled/g' /etc/selinux/config >/dev/null 2>&1
fi
rpm -qa | grep rpcbind >/dev/null 2>&1
if [ $? -ne 0 ];then
yum install rpcbind -y
fi
rpm -qa | grep nfs-utils>/dev/null 2>&1
if [ $? -ne 0 ];then
yum install nfs-utils -y
fi
cat /etc/exports |grep -v ^#
if [ $? -ne 0 ];then
echo "/share 192.168.235.0/24(rw,sync)" >>/etc/exports
fi
systemctl start rpcbind
systemctl start nfs-utils
ss -ntltp|grep 111
if [ $? -eq 0 ];then
echo "nfs has been started"
fi
[root@nfs ~]# ./nfs.sh
/share 192.168.235.0/24(rw,sync)
LISTEN 0 128 *:111 *:* users:(("rpcbind",pid=721,fd=8))
LISTEN 0 128 *:22 *:* users:(("sshd",pid=1115,fd=3))
LISTEN 0 128 [::]:111 [::]:* users:(("rpcbind",pid=721,fd=11))
LISTEN 0 32 [::]:21 [::]:* users:(("vsftpd",pid=1119,fd=4))
LISTEN 0 128 [::]:22 [::]:* users:(("sshd",pid=1115,fd=4))
nfs has been started
[root@nfs ~]#192.168.20
root@192.168.235.20's password:┌────────────────────────────────────────────────────────────────────┐│ • MobaXterm 20.0 • ││ (SSH client, X-server and networking tools) ││ ││ ➤ SSH session to root@192.168.235.20 ││ • SSH compression : ✘ ││ • SSH-browser : ✔ ││ • X11-forwarding : ✔ (remote display is forwarded through SSH) ││ • DISPLAY : ✔ (automatically set on remote server) ││ ││ ➤ For more info, ctrl+click on help or visit our website │└────────────────────────────────────────────────────────────────────┘Last login: Sun Aug 17 19:47:21 2025 from 192.168.235.1
[root@web ~]# cat lucky.txt|cut -c8-11 >>tail
[root@web ~]# cat tail
7630
0185
0702
3305
5098
7630
0185
0702
3305
5098
[root@web ~]# rm -rf tail
[root@web ~]# cat lucky.txt|cut -c8-11 >>tail
[root@web ~]# cat tail
7630
0185
0702
3305
5098
[root@web ~]# paste head tail
139 7630
139 0185
139 0702
139 3305
139 5098
您在 /var/spool/mail/root 中有新邮件
[root@web ~]# paste head tail >>lucky1.txt
[root@web ~]# cat lucky1.txt
139 7630
139 0185
139 0702
139 3305
139 5098
[root@web ~]# tr [ ] [*]<<lucky1.txt
> ^C
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr [] [*] <lucky1.txt
139 7630
139 0185
139 0702
139 3305
139 5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr [ ] [*]<lucky1.txt
tr: 额外的操作数 "[*]"
Try 'tr --help' for more information.
[root@web ~]# tr [ ] ["*"]<lucky1.txt
tr: 额外的操作数 "[*]"
Try 'tr --help' for more information.
[root@web ~]# tr [ ] ‘*’ <lucky1.txt
tr: 额外的操作数 "‘*’"
Try 'tr --help' for more information.
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr ‘ ’ ‘*’ <lucky1.sh
-bash: lucky1.sh: 没有那个文件或目录
[root@web ~]# tr ‘ ’ ‘*’ <lucky1.txt
tr: 额外的操作数 "‘*’"
Try 'tr --help' for more information.
[root@web ~]# tr ' ' '*' <lucky1.txt
139 7630
139 0185
139 0702
139 3305
139 5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr '\t''*'<lucky1.txt
tr: "\\t*" 后缺少操作数
当进行替换操作时必须给定两组字符串。
Try 'tr --help' for more information.
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr '\t' '*' <lucky1.sh
-bash: lucky1.sh: 没有那个文件或目录
[root@web ~]# tr '\t' '*' < lucky1.txt
139*7630
139*0185
139*0702
139*3305
139*5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr '\t''****' < lucky1.txt
tr: "\\t****" 后缺少操作数
当进行替换操作时必须给定两组字符串。
Try 'tr --help' for more information.
您在 /var/spool/mail/root 中有邮件
[root@web ~]# tr '\t' '****' < lucky1.txt
139*7630
139*0185
139*0702
139*3305
139*5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]# sed 's/[[:space:]]/****/g' lucky1.txt
139****7630
139****0185
139****0702
139****3305
139****5098
您在 /var/spool/mail/root 中有邮件
[root@web ~]# ls
1828.txt axel-2.4 ftpok.sh mysql-5.6.31.tar.gz process1.sh testfor2.sh user.sh
1837.txt axel-2.4.tar.gz ftp.sh no.txt process.sh testfor3.sh vsftpd1.sh
1.txt bb.conf head null psok.sh testfor4.sh vsftpd2.sh
2-1.java cc.conf httpd-2.4.37 num.sh readme7 testfor.sh vsftpdins.sh
2.java classfi.sh httpd-2.4.37.tar.bz2 ok readme.txt uc.sh vsftpdok.sh
=6 code id.sh okl serverOk.sh uname2.sh vsftpd.sh
alll1 cuser1.sh initial-setup-ks.cfg phonenum.txt service-s.sh unameok.sh vstest.sh
anaconda-ks.cfg dir1 inotify-tools-3.13.tar.gz phon.txt Steam.dll uname.sh wordpress
app dn.sh judgeprimeok.sh php-7.2.17 stuc.sh url.sh wordpress-4.7.3-zh_CN.tar.gz
apr-1.5.2 file20.java judgeprime.sh php-7.2.17.tar.xz sum.sh ur.sh yearok.sh
apr-1.5.2.tar.bz2 file23.java lucky1.txt ping2.sh tail useradd1.sh
apr-util-1.5.4 for51.sh lucky.txt ping.sh test1.sh useradd.sh
apr-util-1.5.4.tar.bz2 for5.sh mysql-5.6.31 primeok.sh testcfor.sh userad.sh
您在 /var/spool/mail/root 中有邮件
[root@web ~]# cat num.sh
a=139
i=0
while [ $i -lt 1000 ]
do
echo $a$[$RANDOM%90000000+10000000]>>phonenum.txt
let i++
done
[root@web ~]# cat phonenum.txt
13910004559
13910029040
13910010475
13910000223
13910020228
13910009012
13910017840
13910014343
13910025615
13910007374
13910008233
13910032705
13910002975
13910009356
13910027127
13910003880
13910014784
13910005930
13910019907
13910028377
13910010118
13910008908
13910018711
13910018102
13910004180
13910002891
13910011596
13910011245
13910031114
13910005702
13910032462
13910012091
13910001453
13910023714
13910014476
13910007593
13910026917
13910022807
13910019661
13910019404
13910003269
13910013554
13910008990
13910022213
13910025188
13910022523
13910022328
13910026226
13910000872
13910024357
13910020939
13910009457
13910010339
13910012194
13910024557
13910028218
13910027178
13910002072
13910001041
13910007562
13910028728
13910005957
13910026536
13910005721
13910000452
13910007727
13910023371
13910014544
13910001622
13910020779
13910009729
13910019416
13910011646
13910018602
13910019936
13910023866
13910020367
13910025067
13910014521
13910012077
13910021096
13910025397
13910027838
13910026044
13910030037
13910028183
13910020785
13910007395
13910017435
13910007322
13910005289
13910007576
13910013634
13910020014
13910027540
13910002125
13910006861
13910013361
13910008205
13910028521
13910010992
13910009053
13910024141
13910015914
13910001089
13910031244
13910028139
13910011314
13910020606
13910021837
13910020493
13910018614
13910027035
13910007171
13910010089
13910003726
13910023379
13910022489
13910008667
13910020760
13910019940
13910028180
13910014331
13910007569
13910017070
13910021241
13910011089
13910008852
13910018141
13910002542
13910009373
13910030717
13910018093
13910013960
13910029598
13910016893
13910002404
13910016967
13910005353
13910004855
13910019459
13910009903
13910026420
13910012680
13910010093
13910016391
13910013096
13910021679
13910032459
13910026689
13910020128
13910004187
13910032002
13910013262
13910016089
13910018128
13910014855
13910023008
13910019422
13910002637
13910007743
13910027786
13910031207
13910032015
13910001307
13910003154
13910032433
13910018892
13910007644
13910031848
13910015043
13910002110
13910021677
13910021458
13910021457
13910023617
13910022469
13910006242
13910009741
13910017284
13910024530
13910031904
13910015391
13910014537
13910027739
13910028625
13910017353
13910026722
13910020779
13910032374
13910008844
13910019363
13910026620
13910005061
13910017479
13910019083
13910008492
13910029387
13910009869
13910009266
13910010918
13910010600
13910003124
13910018746
13910015553
13910022397
13910011386
13910019093
13910022707
13910010487
13910018519
13910004983
13910018369
13910008147
13910002565
13910032351
13910020009
13910003008
13910002388
13910010846
13910008875
13910021864
13910028556
13910030701
13910007722
13910002750
13910026141
13910013733
13910009428
13910000407
13910012388
13910017315
13910008212
13910008640
13910029857
13910018501
13910024809
13910010199
13910023912
13910032560
13910028715
13910017346
13910018296
13910029332
13910030900
13910018063
13910006091
13910015500
13910011839
13910000323
13910013129
13910014522
13910030137
13910006309
13910009171
13910009342
13910030393
13910003846
13910032020
13910022347
13910022121
13910009151
13910011707
13910001947
13910031644
13910005144
13910021182
13910032000
13910024911
13910011604
13910014907
13910020151
13910010491
13910009952
13910031337
13910023818
13910025852
13910032519
13910019036
13910003331
13910003276
13910031997
13910000357
13910013839
13910026874
13910016824
13910025741
13910006660
13910022441
13910030210
13910016193
13910007876
13910011373
13910023345
13910007167
13910017106
13910013979
13910013901
13910017146
13910027458
13910028493
13910027094
13910015477
13910017878
13910006616
13910028389
13910021699
13910005664
13910016457
13910016952
13910016330
13910013308
13910011213
13910020274
13910005366
13910022975
13910021552
13910020187
13910023826
13910008644
13910031421
13910025205
13910003658
13910027034
13910020105
13910018677
13910028341
13910002891
13910002178
13910020247
13910011274
13910008124
13910003731
13910003043
13910010840
13910013663
13910009216
13910020811
13910023189
13910004252
13910013030
13910030521
13910023633
13910005702
13910010264
13910031523
13910027162
13910029693
13910016679
13910002375
13910028161
13910015174
13910005241
13910027173
13910029652
13910006496
13910005670
13910020859
13910009729
13910011148
13910014600
13910003162
13910008831
13910025554
13910005191
13910032752
13910005433
13910005673
13910006886
13910009325
13910011347
13910021007
13910009085
13910006668
13910018690
13910022885
13910010973
13910017022
13910003304
13910002160
13910005802
13910013593
13910020887
13910026153
13910016340
13910012048
13910008164
13910020812
13910008175
13910020394
13910023256
13910024206
13910023915
13910030718
13910008489
13910014589
13910006500
13910020646
13910024291
13910025800
13910013804
13910030305
13910011875
13910016494
13910008124
13910004960
13910013826
13910006276
13910008795
13910009891
13910029082
13910004766
13910008175
13910019203
13910032105
13910015178
13910007120
13910009803
13910020695
13910000559
13910007520
13910021523
13910031529
13910006134
13910025266
13910024666
13910027659
13910009207
13910027850
13910000156
13910022258
13910032527
13910030143
13910029966
13910006613
13910017266
13910007630
13910027301
13910014728
13910015407
13910002344
13910026678
13910000119
13910013023
13910011272
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“num.txt”
您在 /var/spool/mail/root 中有邮件
[root@web ~]# cat phonenum.txt |sort -R |grep -B 5 num|grep -v ^"num.txt"
13910023345
13910018764
13910004873
13910003330
13910012541
“num.txt”
您在 /var/spool/mail/root 中有邮件
[root@web ~]# cat phonenum.txt |sort -R |grep -B 5 num|grep -v ^num
13910030753
13910019363
13910005289
13910005191
13910008205
“num.txt”
[root@web ~]# cat phonenum.txt |sort -R |grep -B 5 num|grep -v ^“num.txt”
13910017726
13910011604
13910009216
13910010608
13910010475
您在 /var/spool/mail/root 中有邮件
[root@web ~]# vim luck.sh
您在 /var/spool/mail/root 中有邮件
[root@web ~]# cat luck.sh
cat phonenumber.txt|tr -R|grep -A 5 num|grep -v ^“num.txt”>luvk.txt
cat luvk.txt|cut -c1-3 >he.txt
cat luvk.txt|cut -c8-11 >ta.txt
paste he.txt ta.txt > pa.txt
sed 's/[[:space:]]/****/g' pa.txt >luad.txt
[root@web ~]# chmod +x luck.sh
[root@web ~]# ./luck.sh
cat: phonenumber.txt: 没有那个文件或目录
tr：无效选项 -- R
Try 'tr --help' for more information.
[root@web ~]# vim luck.sh
您在 /var/spool/mail/root 中有邮件
[root@web ~]# ./luck.sh
cat: phonenumber.txt: 没有那个文件或目录
[root@web ~]# vim luck.sh
[root@web ~]# cat luck.sh
cat phonenum.txt|sort -R|grep -A 5 num|grep -v ^“num.txt”>luvk.txt
cat luvk.txt|cut -c1-3 >he.txt
cat luvk.txt|cut -c8-11 >ta.txt
paste he.txt ta.txt > pa.txt
sed 's/[[:space:]]/****/g' pa.txt >luad.txt
[root@web ~]# ./luck.sh
您在 /var/spool/mail/root 中有邮件
[root@web ~]# cat luad.txt
139****3617
139****3525
139****7644
139****6141
139****4299
[root@web ~]#