shell命令大全
hadoop fs 具体命令 OR hdfs dfs 具体命令
两个是完全相同的。
通过 fs命令可以直接看到所有的命令
[root@hadoop102 hadoop-3.1.3]$ bin/hadoop fs
[-appendToFile <localsrc> ... <dst>][-cat [-ignoreCrc] <src> ...][-chgrp [-R] GROUP PATH...][-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...][-chown [-R] [OWNER][:[GROUP]] PATH...][-copyFromLocal [-f] [-p] <localsrc> ... <dst>][-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>][-count [-q] <path> ...][-cp [-f] [-p] <src> ... <dst>][-df [-h] [<path> ...]][-du [-s] [-h] <path> ...][-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>][-getmerge [-nl] <src> <localdst>][-help [cmd ...]][-ls [-d] [-h] [-R] [<path> ...]][-mkdir [-p] <path> ...][-moveFromLocal <localsrc> ... <dst>][-moveToLocal <src> <localdst>][-mv <src> ... <dst>][-put [-f] [-p] <localsrc> ... <dst>][-rm [-f] [-r|-R] [-skipTrash] <src> ...][-rmdir [--ignore-fail-on-non-empty] <dir> ...]
<acl_spec> <path>]][-setrep [-R] [-w] <rep> <path> ...][-stat [format] <path> ...][-tail [-f] <file>][-test -[defsz] <path>][-text [-ignoreCrc] <src> ...]常用命令实操准备工作
我们要启动集群，然后才能开始操作它
1）启动Hadoop集群（方便后续的测试）
[root@hadoop102 hadoop-3.1.3]$ sbin/start-dfs.sh
[root@hadoop103 hadoop-3.1.3]$ sbin/start-yarn.sh
2）-help：输出这个命令参数
[root@hadoop102 hadoop-3.1.3]$ hadoop fs -help rm
3）创建/sanguo文件夹
[root@hadoop102 hadoop-3.1.3]$ hadoop fs -mkdir /sanguo