how to change FQDN in ubuntu

3

2

I tried to change the FQDN in Ubuntu using sudo -i gedit /etc/hosts and change as shown below:

127.0.0.1   localhost
127.0.1.1   ubuntu.example.com
192.168.217.129 ubuntu.example.com

# 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

after that I tried:

hostname -f

which shows: 

hostname: Name or service not known

How can I change the FQDN?

THARAKA SANDARUWAN

Posted 2015-12-18T06:30:31.087

Reputation: 33

Try the most popular answer here: http://askubuntu.com/questions/158957/how-to-set-the-fully-qualified-domain-name-in-12-04

– Kinnectus – 2015-12-18T07:01:22.723

The below link will help you. http://askubuntu.com/questions/158957/how-to-set-the-fully-qualified-domain-name-in-12-04

– Hussain7 – 2015-12-18T07:01:22.767

Well what'ya know! – Kinnectus – 2015-12-18T07:02:12.103

rather than using sudo with gedit, might I suggest nano? It's quite easy. Occasionaly, vi is the only real option -- but I think that's realistically only for visudo. I wouldn't mix gedit and sudo, myself. – Thufir – 2017-01-04T12:18:47.237

Answers

3

Edit /etc/hostname and put ubuntu 

echo "ubuntu" > /etc/hostname

Put hostname entry as well in following format in /etc/hosts

IP  fqdn   hostname

Your /etc/hosts should look like

  127.0.0.1   localhost
  127.0.1.1   ubuntu.example.com  ubuntu
  192.168.217.129 ubuntu.example.com  ubuntu 
# The following lines are desirable for IPv6 capable hosts

Neel

Posted 2015-12-18T06:30:31.087

Reputation: 234

Asked: 2015-12-18T06:30:31.087

Viewed: 8 809 times

Active: 2017-10-04T13:28:03.917