方法一:
[root@localhost zz]# hostnamectl set-hostname mycomputer
[root@localhost zz]# uname -a
Linux mycomputer 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
方法二:
[root@localhost zz]# vi /etc/hostname
[root@localhost zz]#reboot
在hostname文件中加入主机名“mycomputer_test ”,然后重启,重启后可以看到主机名已经修改
[zz@mycomputer_test ~]$