Hello,
From Last few months I am Using Ubuntu 11.10 Oneiric Ocelot and What can i say its fantastic Ride, Looking Forward to New Version Ubuntu 12.04 LTS Precise Pangolin. Today I Just Installed it and Done the first trick.
This Howto Will work for Ubuntu 13.04 and Ubuntu 13.10.
For Ubuntu 14.04 LTS Trust Tahr Visit this link : http://wp.me/pAJ1o-LD
Now Lets come to the point, This post will guide you How to Hide Users List from Login Screen in Ubuntu 12.04 LTS Precise Pangolin and Ubuntu 11.10 Oneiric Ocelot.
I have created so many users and Forgot to delete users and rebooted Ubuntu and There are long list of user on login screen. Doing some tweaks I came to know about this Howto.
If you have the same problem or confusion this post is your friend.
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-11.10@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) Now Open /etc/lightdm/lightdm.conf, Execute Following command :-
root@tejas-barot-linux-ahmedabad:~# vi /etc/lightdm/lightdm.conf
4)Now Please enter following line to [SeatDefaults] Selection:-
greeter-hide-users=true
For Example your /etc/lightdm/lightdm.conf should look like below :-
[SeatDefaults]
greeter-session=unity-greeter
user-session=ubuntu
greeter-hide-users=true
Now Save and Exit from file. ( ESC and :wq )
5) Now reboot Ubuntu 12.04 LTS Precise Pangolin/Ubuntu 11.10 Oneiric Ocelot, You will not able to see any user on Login screen/Window
I hope this will helps you all.
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Enjoy Ubuntu 12.04 LTS Precise Pangolin 🙂 Enjoy Ubuntu 11.10 Oneiric Ocelot 
Enjoy Ubuntu Enjoy Open Source Enjoy Linux
Hello,
Mostly It should work. Always recommend to take backup and try.
This site has quite useful information in it. The best part is that it is easy to understand. I have a problem, At the moment I am using Ubuntu 11.04, I want to upgrade to 12.04. Can I do the upgrade without losing any of my data? Plus I sometimes connect to the internet using a modem, will the modem work on 12.04?
Thanks a Lot or quick update and correcting me.
Why not just prefix the commands with sudo, just like nearly EVERY other guide uses. It’s how Ubuntu is setup (with root intelligently disabled).
Why do you make guides which assume the root account is enabled? You will get a lot of confused users falling at the first command as it WON’T WORK.