1.ECS(CentOS7)主机名修改命令

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 192.168.219.129:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

Last login: Tue Mar 19 20:33:31 2019 from 192.168.219.1
[root@c71 ~]#