centos6
需要修改两处：一处是/etc/sysconfig/network，另一处是/etc/hosts，只修改任一处会导致系统启动异常。零时修改用hostname your-name
cnet os 7 修改主机名称，零时生效
[root@centos7 ~]# hostname 1234 [root@centos7 ~]# hostname 1234
cent os 7修改主机名称,永久生效
[root@localhost ~]# hostname localhost.localdomain [root@localhost ~]# hostnamectl set-hostname lxtcentos7 [root@localhost ~]# hostname lxtcentos7 [root@localhost ~]#