How to Run a Complete Gui as Root?

Question

I don't care if I mess up the system (which is likely if I do things like this), or the potential security issues that this could imply. Note, that I don't just want to "enable root login?", but run my GUI from bottom-up as root. I don't want to type my password for anything but just for login and have total control over it.

Of course, I want any application running as root, like Firefox, LibreOffice, etc. without having to mess up with the terminal. So, how do I do this?

This question tries to address users that do not like the current permission system with root being separated from normal users. I do not endorse such behaviors, but if a user wants to, for whatever reason, this question should fit their corncerns.

Not advisable for new users

Accepted Answer

Must Read

Read this before doing anything Why is it bad to log in as root?

First of all, you must set root 's password.

sudo passwd root
Enter new UNIX password:

Now you have root password. Now activate the root account:

sudo usermod -U root

Then you should allow lightdm, gdm or kdm to allow logging in as root.

To enable this:

In GDM

Edit /etc/gdm/custom.conf file and include AllowRoot=true.

Additionally, in newer versions of Ubuntu, you need to edit /etc/pam.d/gdm-password and comment out the line containing:

auth required pam_succeed_if.so user != root quiet_success

so that it looks like this:

#auth required pam_succeed_if.so user != root quiet_success

In KDM

Edit either /etc/sddm.conf or create the file /etc/sddm.conf.d/uid.conf and add/change MinimumUid for MinimumUid=0. It will show all users on the system including root.

In LightDM

This procedure enables the "Other" menu, so you can type the username root and login. You must edit /etc/lightdm/lightdm.conf and add greeter-show-manual-login=true. Then reboot.

Others session managers have other methods to accomplish this.

As you have noticed I gave the instructions but by any circumstance you should not run the GUI as root. Murphy's Law says that it is likely that you mess up somehow and will be annoyed starting again.