Enable root User2012/04/27

	The root user in Ubuntu is disabled by default because his password is not set. But if you'd like to use root user by some reason, enable it like follows.
[1]	Set root password

pangolin@dlp:~$

Enter new UNIX password:

# set root password

Retype new UNIX password:

# confirm

passwd: password updated successfully
pangolin@dlp:~$

su -

Password:

# root password

root@dlp:~#

# just switched

*	The examples on this site show as a root user from now. If you use sudo, add "sudo" at the head of commands.

[2]	If you enable root, limit users to switch to root.

root@dlp:~#

vi /etc/pam.d/su

# line 15: uncomment and add a group that can switch to root

auth required pam_wheel.so

group=adm

root@dlp:~#

vi /etc/group

adm:x:4:

pangolin

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