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Possible Duplicate:
How to restrict users on changing their wallpapers?

I'm trying to lock the desktop background (So, that it cannot be changed by others) but can not find the way, I got it in 10.04 with "gconf-editor", but now I can not do this in 12.04

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marked as duplicate by Eliah Kagan, Jorge Castro, Mitch, ajmitch, RolandiXor Aug 17 '12 at 4:48

This question was marked as an exact duplicate of an existing question.

Are you talking about LOCK SCREEN feature. – atenz Jul 19 '12 at 9:16
No, i'm talking about the DESKTOP BACKGROUND, i want that user can't change it – eversman Jul 19 '12 at 11:15
You can refer this… – atenz Jul 19 '12 at 11:17
I solved part but not all, THANKS!! – eversman Jul 19 '12 at 11:50

Besides the list of solutions which can answer your question which can be found to this similar question.

Another way to achieve that is the following:

Open terminal and login as root:

sudo -i


chmod 744 /usr/bin/ gnome-appearance-properties

To restore:

chmod 755 /usr/bin/gnome-appearance-properties
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Thanks for the reply, but i have a problem i got not installed "gnome-appearance-properties", i'm working with Unity not with gnome... I resolve the problem changing the wallpaper from desktop, but now the problem is i can change it from firefox – eversman Jul 20 '12 at 6:39
did you try restoring it? – Rrjrjtlokrthjji Jul 20 '12 at 9:44
Sorry, but restoring what???? – eversman Jul 20 '12 at 10:19
restore "gnome-appearance-properties" by typing the second command – Rrjrjtlokrthjji Jul 20 '12 at 10:50
i got not installed "gnome-appearance-properties", or in my /usr/bin & /usr/sbin don't appear. In 10.04 y solved the problem with gconf-editor, but 12.04 it don't works. But with the @tijybba reply i solve almost completely, the firefox part i solve with a addon called "menu-editor", is not the best way to solve it, but works!! – eversman Jul 20 '12 at 11:30

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