HDFS Shell 操作
HDFS Shell 命令行格式
- 格式一:hadoop fs –命令名 参数
- 格式二:hdfs dfs –命令名 参数
HDFS 常用命令及参数
[root@node-01 ~]# hadoop fs -ls /
-
put或copyFromLocal:将本地文件上传到 hdfs 中
[root@node-01 ~]# hadoop fs -put hdp.test01 /
#或者
[root@node-01 ~]# hadoop fs -copyFromLocal master.log /
-
moveFromLocal:将本地文件移动到 hdfs 中
[root@node-01 ~]# hadoop fs -moveFromLocal master.log /
-
get或copyToLocal:从 hdfs 下载文件到本地
[root@node-01 ~]# hadoop fs -get /install.log ./
#或者
[root@node-01 ~]# hadoop fs -copyToLocal /install.log ./
-
moveToLocal:将 hdfs 文件移动到本地中
[root@node-01 ~]# hadoop fs -moveToLocal /install.log ./
[root@node-01 ~]# hadoop fs -mkdir /test
[root@node-01 ~]# hadoop fs -mv /install.log /test/install01.log
[root@node-01 ~]# hadoop fs -rm -r /test
[root@node-01 ~]# hadoop fs -rmdir /test
[root@node-01 ~]# hadoop fs -cat /master.log
#或者
[root@node-01 ~]# hadoop fs -tail -f /master.log
-
appendToFile:追加内容到 hdfs 文件中
[root@node-01 ~]# hadoop fs -appendToFile hello.log /install.log
-
chown:修改 hdfs 文件权限(hdfs没有真正权限模块,可以修改为任何用户名或组群)
[root@node-01 ~]# hadoop fs -chown binge:bingegroup /master.log
# 修改 hdfs 文件权限(WebUI即可操作HDFS文件)
[root@node-01 ~]# hadoop fs -chmod -R 777 /
[root@node-01 ~]# hadoop fs -cp /master.log /master.log1
[root@node-01 ~]# hadoop fs -df -h /
[root@node-01 ~]# hadoop fs -du -h -s /test
-
count:统计 hdfs 指定目录的文件节点数量
[root@node-01 ~]# hadoop fs -count /test
[root@node-01 ~]# hadoop fs -setrep 3 /test.txt
[root@node-01 ~]# hadoop fs -help
Usage: hadoop fs [generic options]
[-appendToFile ... ]
[-cat [-ignoreCrc] ...]
[-checksum ...]
[-chgrp [-R] GROUP PATH...]
[-chmod [-R] PATH...]
[-chown [-R] [OWNER][:[GROUP]] PATH...]
[-copyFromLocal [-f] [-p] [-l] [-d] [-t ] ... ]
[-copyToLocal [-f] [-p] [-ignoreCrc] [-crc] ... ]
[-count [-q] [-h] [-v] [-t []] [-u] [-x] [-e] ...]
[-cp [-f] [-p | -p[topax]] [-d] ... ]
[-createSnapshot []]
[-deleteSnapshot ]
[-df [-h] [ ...]]
[-du [-s] [-h] [-v] [-x] ...]
[-expunge [-immediate]]
[-find ... ...]
[-get [-f] [-p] [-ignoreCrc] [-crc] ... ]
[-getfacl [-R] ]
[-getfattr [-R] {-n name | -d} [-e en] ]
[-getmerge [-nl] [-skip-empty-file] ]
[-head ]
[-help [cmd ...]]
[-ls [-C] [-d] [-h] [-q] [-R] [-t] [-S] [-r] [-u] [-e] [ ...]]
[-mkdir [-p] ...]
[-moveFromLocal ... ]
[-moveToLocal ]
[-mv ... ]
[-put [-f] [-p] [-l] [-d] ... ]
[-renameSnapshot ]
[-rm [-f] [-r|-R] [-skipTrash] [-safely] ...]
[-rmdir [--ignore-fail-on-non-empty] ...]
[-setfacl [-R] [{-b|-k} {-m|-x } ]|[--set ]]
[-setfattr {-n name [-v value] | -x name} ]
[-setrep [-R] [-w] ...]
[-stat [format] ...]
[-tail [-f] [-s ] ]
[-test -[defswrz] ]
[-text [-ignoreCrc] ...]
[-touch [-a] [-m] [-t TIMESTAMP ] [-c] ...]
[-touchz ...]
[-truncate [-w] ...]
[-usage [cmd ...]]