centos修改主机名
1、临时修改，重启失效
[root@centos17 ~]# hostname abc [root@centos17 ~]# hostname abc
2、永久修改，修改配置文件，重启生效
[root@centos17 ~]# cat /etc/hostname centos17
修改主机hosts文件，用域名替代ip
[root@centos17 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 [root@centos17 ~]#
原文：https://www.cnblogs.com/xiaofeng666/p/13212675.html