hadoop 常用命令总结

hdfs dfs

[-cat [-ignoreCrc] <src> ...]

[-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
[-chown [-R] [OWNER][:[GROUP]] PATH...]
[-copyFromLocal [-f] [-p] [-l] <localsrc> ... <dst>]    ===         [-put [-f] [-p] [-l] <localsrc> ... <dst>]
[-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>] === [-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]

[-cp [-f] [-p | -p[topax]] <src> ... <dst>]

[-du [-s] [-h] [-x] <path> ...]

    [-mv <src> ... <dst>]
        [-mkdir [-p] <path> ...]
        [-rm [-f] [-r|-R] [-skipTrash] <src> ...]

hdfs dfsadmin
[-report [-live] [-dead] [-decommissioning]]
[-safemode <enter | leave | get | wait>]

hdfs haadmin

健康检查
hdfs fsck /

安全模式
hdfs dfsadmin -safemode get
安全模式 可读不可写

回收站
开启 回收站 便于数据误删后的恢复
fs.trash.interval
core-sit.xml 配置

各节点的平衡

hadoop 常用命令总结

原文：https://blog.51cto.com/u_15084467/2872659