[Abbreviated] Centos7 permanently change the hostname

1, before change

[root@localhost ~]# hostname
localhost.localdomain

 

2, execute the following command on the command line (Node01 is the hostname of the newly set)

 hostnamectl set-hostname Node01

　　

[root@localhost ~]# hostname
node01
[root@localhost ~]# vim /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 # 
# :: 1 localhost localhost.localdomain localhost6 localhost6.localdomain6 

# comment out the top two lines of the original host name, we use can not be changed after the completion of hostnamectl change / etc / hosts file folder here need to manually change 

127.0.0.1 node01

　　

Restart the host, to see whether the changes to take effect

[root@node01 ~]# reboot

[root@localhost ~]# hostname
node01