====== useradd/userdel in Linux ======

===== useradd =====
<code>
useradd -g users -G audio,tty,wheel,dba -s /bin/bash -m <user>
</code>

===== userdel =====
<code>
userdel <user>
</code>

===== Allow user to 'su - root' without a password ====
  * Edit /etc/pam.d/su and uncomment the appropriate line
  * Add user to /etc/security/suauth.nopasswd

Now the user can su to root without a password.