me@ubuntu:~$ sudo su
[sudo] password for me:
root@ubuntu:/home/me# user-admin
No command 'user-admin' found, did you mean:
Command 'users-admin' from package 'gnome-system-tools' (main)
user-admin: command not found
root@ubuntu:/home/me# users-admin
(users-admin:20202): Liboobs-WARNING **: There was an unknown error communicating with the backends: Failed to execute program /lib/dbus-1.0/dbus-daemon-launch-helper: Success
root@lubuntu:/home/me# gdmsetup
** (gdmsetup:18625): DEBUG: init delay=30
** (gdmsetup:18625): DEBUG: "/usr/share/xsessions/guest-restricted.desktop" is hidden or contains non-executable TryExec program
** (gdmsetup:18625): DEBUG: "/usr/share/xsessions/une-efl-guest-restricted.desktop" is hidden or contains non-executable TryExec program
** (gdmsetup:18625): DEBUG: "/usr/share/xsessions/une-guest-restricted.desktop" is hidden or contains non-executable TryExec program
** (gdmsetup:18625): DEBUG: Init default session found:'gnome'
** (gdmsetup:18625): DEBUG: Failed to identify the current session: Failed to execute program /lib/dbus-1.0/dbus-daemon-launch-helper: Success
** (gdmsetup:18625): WARNING **: Unable to find users: no seat-id found
** (gdmsetup:18625): DEBUG: GdmUserManager: explicitly skipping user: nobody
** (gdmsetup:18625): DEBUG: GdmUserManager: user icon changed
** (gdmsetup:18625): DEBUG: adding monitor for '/home/elena/.face'
** (gdmsetup:18625): DEBUG: Getting list of sessions for user 1000
** (gdmsetup:18625): DEBUG: Failed to find sessions for user: Failed to execute program /lib/dbus-1.0/dbus-daemon-launch-helper: Success
** (gdmsetup:18625): WARNING **: Failed to unlock: Remote Exception invoking org.freedesktop.PolicyKit1.Authority.CheckAuthorization() on /org/freedesktop/PolicyKit1/Authority at name org.freedesktop.PolicyKit1: org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program /lib/dbus-1.0/dbus-daemon-launch-helper: Success
root@ubuntu:/home/me#