CENTOS 7.0 Change hostname

In Centos/rhel 7, there is a command-line tool called Hostnamectl, which allows you to view or modify the configuration associated with a host name.

To view the host name-related settings:

$ HOSTNAMECTL Status

View only static, transient, or flexible hostname, using "--static", "--transient" or "--pretty" options, respectively.

$ hostnamectl Status [--static|--transient|--pretty]

To modify all three host names at the same time: static, transient, and flexible hostname: change to www

$ sudo hostnamectl set-hostname "www"

Set the/etc/hosts to save the changes, or the restart will fail.

If you only want to modify a specific hostname (static, transient or flexible), you can use the "--static", "--transient" or "--pretty" option.

For example, to permanently modify a host name, you can modify the static hostname:

You do not have to restart the machine to activate the permanent hostname modification. This command modifies the kernel host name immediately.

$ sudo hostnamectl--static set-hostname

CENTOS 7.0 Change hostname