Centos host name modification command

To modify the Host Name of centos, You need to modify either the/etc/sysconfig/network command or the/etc/hosts command. If you modify only one of the two commands, the system startup exception will occur. Switch to the root user first. Vi/etc/sysconfig/network open the file with any of your favorite editors, which contains a line of HOSTNAME = localhost. modify localhost. localdomain is your host name. Vi/etc/hosts www.2cto.com open the file, there will be a line 127.0.0.1 localhost. localdomain localhost. Here, 127.0.0.1 is the local loop address, and localhost. localdomain is the host name (hostname), that is, what you want to modify. Localhost is the alias of the Host Name (alias). It appears at the Konsole prompt. Modify the second item to your host name. The third item is optional. After the above two files are modified, they cannot take effect immediately. If it takes effect immediately, you can use hostname your-hostname for temporary modification. It only modifies the host name temporarily and will be restored after the system is restarted. However, the modification of the above two files is permanent, and the new host name will be obtained after the system is restarted. Finally, check the host name uname-n after restarting.