HDFS的shell命令操作 大蘿蔔部落格

[root@node01 hadoop-2.6.0-cdh5.14.0]# bin/hdfs dfs

usage: hadoop fs [generic options]

[-cat [-ignorecrc] ...]
[-checksum ...]
[-chgrp [-r] group path...]
[-chmod [-r] path...]
[-chown [-r] [owner][:[group]] path...]
[-copyfromlocal [-f] [-p] [-l] ... ]
[-copytolocal [-p] [-ignorecrc] [-crc] ... ]
[-count [-q] [-h] [-v] [-x] ...]
[-cp [-f] [-p | -p[topax]] ... ]
[-createsnapshot ]
[-deletesnapshot ]
[-df [-h] [...]]
[-du [-s] [-h] [-x] ...]
[-expunge]
[-find ... ...]
[-get [-p] [-ignorecrc] [-crc] ... ]
[-getfacl [-r] ]
[-getfattr [-r]  [-e en] ]
[-getmerge [-nl] ]
[-help [cmd ...]]
[-ls [-c] [-d] [-h] [-q] [-r] [-t] [-s] [-r] [-u] [...]]
[-mkdir [-p] ...]
[-movefromlocal ... ]
[-movetolocal ]
[-mv ... ]
[-put [-f] [-p] [-l] ... ]
[-renamesnapshot ]
[-rm [-f] [-r|-r] [-skiptrash] ...]
[-rmdir [--ignore-fail-on-non-empty] ...]
[-setfacl [-r] [  ]|[--set ]]
[-setfattr  ]
[-setrep [-r] [-w] ...]
[-stat [format] ...]
[-tail [-f] ]
[-test -[defsz] ]
[-text [-ignorecrc] ...]
[-touchz ...]
[-usage [cmd ...]]

hdfs dfs  -chmod  666  /hello.txt

hdfs dfs  -chown  someuser:somegrp   /hello.txt

這裡設定的副本數只是記錄在namenode的元資料中，是否真的會有這麼多副本，還得看datanode的數量。因為目前只有3臺裝置，最多也就3個副本，只有節點數的增加到10台時，副本數才能達到10。

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