Issue when sudo something after a hostname change

Question

I was tired of my system's name so i decided to change it. I gksudo gedit /etc/hostname and changed my first and never touched computer name to a new one. Then now when i sudo something like sudo gedit my terminal prompts ~: unable to resolve host <my_new host_name_i_gksudo>.

When i sudo cat /etc/hosts it gives me:

sudo: unable to resolve host <not_of_your_business!>
127.0.0.1   localhost
127.0.1.1   leviathan

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

How could i get rid of this problem? Thanks in advance.

Solution 1

Have you defined your new hostname in your /etc/hosts file?

When changing your hostname, you need to alter it in both the /etc/hostname and /etc/hosts files. And once you've done that, either reboot or restart the hostname service:

sudo service hostname restart

Solution 2

Change this line in /etc/hosts:

127.0.1.1     your-old-hostname

to:

127.0.1.1     your-new-hostname

Comments

[user.dz]

Use su - but if you didn't setup root password, boot to recovery mode.