How do I change the hostname in Linux?

[petulia3478]

To change the hostname dynamically i.e. the change won't be permanent after a reboot:

# hostname <my_hostname>

To make the hostname change permanent i.e. persistent after a reboot:

# vi /etc/hosts

Change the hostname as appropriate, save and exit the file.

# vi /etc/sysconfig/network

Change the hostname as appropriate, save and exit the file.