设置主机名
[root@yugo /tmp 11:04:42]#hostnamectl set-hostname pyyuc
[root@pyyuc ~ 11:05:12]#hostname
pyyuc
[root@centos7 ~]#: hostnamectl
Static hostname: centos7.young
Icon name: computer-vm
Chassis: vm
Machine ID: ee70dec0f355401ca243affd75e37838
Boot ID: a19d2818a0904e839e211d519887a214
Virtualization: vmware
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-957.10.1.el7.x86_64
Architecture: x86-64