動手實操修改 Linux 主機名

修改主機名

root用戶登錄，執行命名修改主機名

[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

重新登錄服務器，hostname 已改變

[root@im-test-hadoop03 ~]# 

修改 /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

192.168.3.198   im-test-hadoop01 hadoop3198
192.168.3.199   im-test-hadoop02 hadoop3199
192.168.3.200   im-test-hadoop03 hadoop3200

至此主機名修改完成。