命令：
hostnamectl
使用--help参数查看hostnamectl里面每个参数对应的含义：
[root@localhost ~]# hostnamectl --help
Query or change system hostname.
-h --help Show this help
--version Show package version
--no-ask-password Do not prompt for password
-H --host=[USER@]HOST Operate on remote host
-M --machine=CONTAINER Operate on local container
--transient Only set transient hostname
--static Only set static hostname
--pretty Only set pretty hostname
Commands:
status Show current hostname settings
set-hostname NAME Set system hostname
set-icon-name NAME Set icon name for host
set-chassis NAME Set chassis type for host
set-deployment NAME Set deployment environment for host
set-location NAME Set location for host //设置本地主机名
接下来进行主机名的重新设置：
[root@localhost ~]# hostnamectl set-hostname C71
断开当前连接：
[root@localhost ~]# exit
logout Connection closed by foreign host.
重连：//连接后会发现主机名称已经修改
Connecting to 192.168.219.129:...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'. Last login: Tue Mar :: from 192.168.219.1
[root@c71 ~]#