linux修改主机名

查看当前主机名

[root@localhost etc]# hostname
localhost

# 查看当前主机信息。注：该命令只在centos7及之后的版本生效
[root@rm ~]# hostnamectl
   Static hostname: rm
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 20200218155604663518171520219378
           Boot ID: c928914e0c5543c5a1b685264c54a975
    Virtualization: kvm
  Operating System: CentOS Linux 8 (Core)
       CPE OS Name: cpe:/o:centos:centos:8
            Kernel: Linux 4.18.0-147.5.1.el8_1.x86_64
      Architecture: x86-64

# 修改主机名称
#临时更改
hostname 	
#命令更改.注：该命令只在centos7及之后的版本生效			
hostnamectl set‐hostname rm02 		
#配置文件修改 							 
vi /etc/hostname