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Old 11-13-2004, 09:32 PM   #1
Registered: Mar 2004
Location: Berlinsville
Distribution: Slackware/Fedora
Posts: 103

Rep: Reputation: 15
Arrow Xscreensaver- making the sonar screensaver ping


On xscreensaver, there is a screensaver called sonar. You can make it ping a subnet,
but you have to be root to do it, since I get that error message whenever the screensaver
runs, saying -

"This program must be run as root for "ping mode" to work."

This is what the screensaver command looks like on xscreensaver-demo-

sonar -root -ping subnet/29

So, does any body kno how to get this working? The version of
xscreensaver is 4.16.

Old 11-14-2004, 06:23 PM   #2
Senior Member
Registered: Jul 2004
Distribution: Ubuntu 7.04
Posts: 1,991

Rep: Reputation: 76
According to the sonar manpage, you can either set the ping mode to ping a simulated subnet:
sonar -root -ping simulation
or risk possible security vunrabilities and make sonar setuid:
chown root.root sonar
chmod a+s sonar
(the last pair of commands should be run from the same directory as the sonar executable; you can find this with the sonar command).
1 members found this post helpful.
Old 02-01-2019, 10:38 AM   #3
LQ Newbie
Registered: Jan 2010
Location: brighton england
Distribution: Debian not Ubuntu
Posts: 21

Rep: Reputation: 0
chmod a+s sonar

thank you for this very helpful thread.
If you have a 64 bit version of linux you need chmod +s sonar
and not chmod a+s sonar. for the 32 bit versions of linux chmod a+S is ok.
at least that is what worked for me.


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