3.查看集群状态
# master [root@master bin]# jps 2116 JobTracker 2232 Jps 1883 NameNode 2044 SecondaryNameNode # slave1 [root@master bin]# ssh slave1 Last login: Sat Sep 1 11:20:05 2018 from slave2 [root@slave1 ~]# jps 3936 Jps 1617 TaskTracker 1538 DataNode #slave2 [root@slave1 ~]# exit logout Connection to slave1 closed. [root@master bin]# ssh slave2 Last login: Sat Sep 1 11:20:24 2018 from slave1 [root@slave2 ~]# jps 3774 TaskTracker 3695 DataNode 3871 Jps4.hadoop文件操作示例
# 查看/ [root@master bin]# ./hadoop fs -ls / Found 1 items drwxr-xr-x - root supergroup 0 2018-09-01 11:38 /usr # 上传文件 [root@master bin]# ./hadoop fs -put /etc/passwd / [root@master bin]# ./hadoop fs -ls / Found 2 items -rw-r--r-- 3 root supergroup 847 2018-09-01 11:44 /passwd drwxr-xr-x - root supergroup 0 2018-09-01 11:38 /usr # 查看文件内容 [root@master bin]# ./hadoop fs -cat /passwd root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin systemd-network:x:192:192:systemd Network Management:/:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin polkitd:x:999:998:User for polkitd:/:/sbin/nologin sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin postfix:x:89:89::/var/spool/postfix:/sbin/nologin wadeyu:x:1000:1000:wadeyu:/home/wadeyu:/bin/bash 说明虚拟机使用了桥接模式连接，我在路由器增加了虚拟机mac地址和ip的绑定，所以虚拟机没有固定ip
参考资料【0】八斗学院内部学习资料