Edit /etc/hostname and change the text to your hostname:
Edit /etc/hosts and edit like 2 to look like the following (under the one written 127.0.0.1 localhsot).
127.0.1.1 blog.devget.net blog
Where blog.devget.net is your FQDN and blog is your hostname
save and test your config by typing the following
This should output blog
This should output blog.devget.net