Page 220 - DCAP602_NETWORK_OPERATING_SYSTEMS_I

Network Operating Systems-I

notes CHANGE - SEE BELOW FOR XFCE 4.2

XFCE 4.0

First, all users who are allowed to shut down the machine from xfce4 must be listed in the /
etc/xfce4/shutdown.allow file (syntax is just like in the /etc/shutdown.allow file - see above).
Second, the file permissions on the xfce4-shutdown program must be modified. This file is
usually in /usr/sbin/xfce4-shutdown, so I would type
chmod u+s /usr/sbin/xfce4-shutdown
the “u+s” argument means that the command xfce4-shutdown will run as though the owner
(probably root) initiated it, regardless of which user actually called the program.
This should be enough to shut down the computer from xfce4.
instructions for xfce 4.2 The game has changed for xfce 4.2. Now you must instead allow sudo
access to a program called /usr/sbin/xfsm-shutdown-helper (note: this may also be located in /
usr/local/libexec/ - just use the “locate” command to find xfsm-shutdown-helper).
Using the same kind of ideas presented above in the sudo method of shutdown, I add the
following line to /etc/sudoers file (using visudo)
%shutdown ALL=(root) NOPASSWD: /usr/sbin/xfsm-shutdown-helper
This allows the “shutdown” group to shutdown the machine.

11.3 creating groups

To create a new group:
Start Linuxconf by typing linuxconf at the shell prompt.
Open [Config] Æ [Users accounts] Æ [Normal] Æ [Group definition].
If you have more than 15 groups, you will be given the option to select the groups by providing
a prefix.

figure 11.1: group filter screen

214 LoveLy professionaL university