In this post learn,how to change hostname in Ubuntu 12.04 and 12.10 without system restart.
Here, there are few steps through which we can change the hostname of system without reboot.
System OS: Ubuntu 12.04 LTS n l
Follow steps to change hostname in Ubuntu 12.04 LTS and Ubuntu 12.10
Step 1: Edit the /etc/hosts file and give the hostname which you want.
We have added the new line
127.0.1.1 tuxworld, this is our system new hostname.
root@mymachine:~$sudo vi /etc/hosts 127.0.0.1 localhost 127.0.1.1 tuxworld # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 22.214.171.124 root@mymachine:~$
Step 2: Now edit /etc/hostname and give the hostname you want. You can see here, we have given hostname as “tuxworld”.
root@mymachine:~$sudo vi /etc/hostname tuxworld root@mymachine:~$
Step 3: Restart the /etc/init.d/hostname.sh (In Ubuntu 12.04)
Restart the /etc/init.d/hostname (In Ubuntu 12.10)
Step 4: Exit from the terminal and reopen once again.
You can also logout and login back to see the changes.
Step 5: Use
hostname command to check hostname of system. This is how you can verify at the end.