Setting a Hostname in Linux

Log into the terminal with a user that possesses sudo privileges or as root
Open, in vi the /etc/hostname file
Press i to enter insert mode
Delete the contents of the file and then type in the desired hostname. In my example I used fedora22 as the hostname
Press Esc then :wq to save the file and quit vi
Open the /etc/hosts file in vi and erase all the contents of the file
Enter the IP of the local NIC, hit Tab, then the FQDN of the machine, Tab, and then the hostname of the machine
Save and quit the file
Reboot the machine

Linux Liaison