You can use this same How to for Ubuntu 13.10 / Ubuntu 13.04 / Ubunty 12.10 / Ubuntu 12.04.
For Ubuntu 14.04 LTS Trusty Tahr Visit this link :- http://wp.me/pAJ1o-LL
This post will helps you to Login as root from GUI or Login as any Other User from Network (i.e. LDAP ) from Login Screen on 12.04 LTS Precise Pangolin.
This Howto will show you to Login as Other User from Login Screen on Ubuntu 12.04 LTS Precise Pangolin.
Just Few Days Back I have written Howto for Login as root from GUI and Just came to see from Comments that there is no “other” Option on login screen for Ubuntu 12.04 LTS Precise Pangolin.
I have received many comments to write Howto On the same as i have found it on the next day but i was busy so unable to publish How to on the same topic.
If you are unable to see “OTHER” Option on Login Screen on Ubuntu 12.04 LTS, Please Perform following steps to do the trick :-
DO IT AT YOUR OWN RISK.
1) You have to be root to perform this how-to.
If you are not root then be root by executing following command :-
ubuntu-12.04lts@tejas-barot-linux-ahmedabad:~$ sudo su – ( Single Hyphen )
2) First of all Please take backup of original file, execute following command :-
root@tejas-barot-linux-ahmedabad:~# cp -p /etc/lightdm/lightdm.conf /etc/lightdm/lightdm.conf.orig
3) Execute Following command :-
root@tejas-barot-linux-ahmedabad:~#/usr/lib/lightdm/lightdm-set-defaults -m true
3) OPTIONAL :- If Above command does not work than you can do the same thing By Editing /etc/lightdm/lightdm.conf using Different Editors like below :-
Method Using Nano Editor :-
You can also use “nano” Editor to edit the file, If you are not editing as root then As Privileged User execute “sudo /usr/bin/nano /etc/lightdm/lightdm.conf”
And Make changes as i mentioned below and Press “CTRL + O” and Hit Enter and then “CTRL + X”
root@tejas-barot-linux-ahmedabad:~# vi /etc/lightdm/lightdm.conf
4)Now Please enter following line to [SeatDefaults] Selection:-
For Example your /etc/lightdm/lightdm.conf should look like below :-
Now Save and Exit from file. ( ESC and :wq ).
UPDATED :- Some User face issues in “vi” editor and they are unable to edit file using vi so as per their comment i would suggest you to try following methods if you are familiar with “vi” editor.
As Per Girija :- Use Graphical Text Editor (gedit), If you are not editing as root then As Privileged User execute “sudo /usr/bin/gedit /etc/lightdm/lightdm.conf”
And make changes i mentioned above and save and exit from file.
5) Now reboot Ubuntu 12.04 LTS Precise Pangolin, You will able to see “OTHER” Or Login window which asks for Username and Password on Login screen/Window.
SPANISH Version of the same post is available at :- http://www.ubuntu-es.org/node/167983 Thanks to Vicram for Translation.
If you want to Login as a root from GUI then click on this link :- http://www.tejasbarot.com/2012/04/28/login-as-a-root-from-gui-ubuntu-12-04-lts-precise-pangolin/
Hope this will helps you all.
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Enjoy Ubuntu 12.04 LTS Precise Pangolin Enjoy Ubuntu Enjoy Open Source Enjoy Linux