[ck@hadoop102 hadoop-2.9.0]$ sbin/start-dfs.sh [ck@hadoop103 hadoop-2.9.0]$ sbin/start-yarn.sh
[ck@hadoop103 hadoop-2.9.0]$ hadoop fs -help rm
[ck@hadoop103 hadoop-2.9.0]$ hadoop fs -ls / （查看/目录） [ck@hadoop103 hadoop-2.9.0]$ hadoop fs -lsr / （查看/目录及子目录）
[ck@hadoop103 hadoop-2.9.0]$ hadoop fs -mkdir -p /sanguo/shuguo
[ck@hadoop103 hadoop-2.9.0]$ touch kongming.txt [ck@hadoop103 hadoop-2.9.0]$ vim kongming.txt [ck@hadoop103 hadoop-2.9.0]$ bin/hadoop fs -moveFromLocal ./kongming.txt /sanguo/shuguo/
[ck@hadoop102 hadoop-2.9.0]$ touch liubei.txt [ck@hadoop102 hadoop-2.9.0]$ vim liubei.txt [ck@hadoop102 hadoop-2.9.0]$ hadoop fs -appendToFile liubei.txt /sanguo/shuguo/kongming.txt [ck@hadoop102 hadoop-2.9.0]$ hadoop fs -cat /sanguo/shuguo/kongming.txt
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -chgrp ck /sanguo/shuguo/kongming.txt
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -copyFromLocal ./caochao.txt /sanguo/shuguo/
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -copyToLocal /sanguo/shuguo/kongming.txt ./
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -cp /sanguo/shuguo/kongming.txt /sanguo/
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -mv /sanguo/kongming.txt /
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -get /kongming.txt ./
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -getmerge /sanguo/shuguo/* ./zaiyiqi.txt
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -put ./LICENSE.txt /sanguo/shuguo/
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -tail /sanguo/shuguo/LICENSE.txt
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -rm /sanguo/shuguo/LICENSE.txt
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -mkdir /test [ck@hadoop102 hadoop-2.9.0]$ hadoop fs -rmdir /test
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -du / 366744329 /hadoop-2.9.0.tar.gz 16 /kongming.txt 49 /sanguo 45 /wc.input [ck@hadoop102 hadoop-2.9.0]$ hadoop fs -du -h / （换算显示） 349.8 M /hadoop-2.9.0.tar.gz 16 /kongming.txt 49 /sanguo 45 /wc.input [ck@hadoop102 hadoop-2.9.0]$ hadoop fs -du -h -s / (目录总和) 349.8 M /
[ck@hadoop102 hadoop-2.9.0]$ hadoop fs -setrep 2 /kongming.txt
这里设置的副本数只是记录在NameNode的元数据中，是否真的会有这么多副本，还得看DataNode的数量。因为目前只有3台设备，最多也就3个副本，只有节点数增加到10台时，副本数才能达到10。
案例整理来源于atguigu视频
原文：https://www.cnblogs.com/zs-chenkang/p/13657683.html