root用户登录,执行命名修改主机名
[root@LinuxCent72IMceshiHadoop33200 ~]# hostnamectl set-hostname im-test-hadoop03查看 /etc/hostname
[root@LinuxCent72IMceshiHadoop33200 ~]# cat /etc/hostname im-test-hadoop03查看 hostname
[root@LinuxCent72IMceshiHadoop33200 ~]# hostname im-test-hadoop03查看 uname -a
[root@LinuxCent72IMceshiHadoop33200 ~]# uname -a Linux im-test-hadoop03 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux重新登录服务器,hostname 已改变
[root@im-test-hadoop03 ~]#至此主机名修改完成。