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Thread: Lockdown Options for Gnome

  1. #1
    Join Date
    Mar 2010
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    Lockdown Options for Gnome

    First Time Poster and Ubuntu Noob here.

    I am getting an Image of Ubuntu ready to deploy in a high school computer lab.

    I have a user profile locked down pretty well using Sabayon.
    I have two things left:

    1- prevent the user from right clicking the desktop and changing the wallpaper/background.

    2- Hide the Places menu so they can't get to Computer and the files therein.

    If I can't do 1, then I would need to have a way to reload default settings at Login time.

    Thanks!

  2. #2
    Join Date
    Jul 2007
    Location
    Burlington, NC
    Beans
    1,994
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Lockdown Options for Gnome

    I work for a school system as well...
    I hope you will take this in the spirit which it is intended...

    My friend, I feel you are heading in the wrong direction.
    Lockdown options can easily be taken too far and this is quite contrary to the whole Linux paradigm.

    Locking down the panels is sensible because it is easy to change them accidentally, especially
    when Gnome is new and unfamiliar. But no right-clicking on the desktop?? come on!!

    How are the youth supposed to learn to use computers if they are not allowed to use the computers?

    Even if you do manage to do this, wallpapers can still be set directly from within firefox.

    Why can't students be allowed to browse "Places -> Computer" ~
    surely you don't have all of them running with root privilege.
    Therefore, they can't possible change, delete, move or overwrite
    any system files outside of their home folder.

    The only viable long-term solution to the lockdown problem is some sort of
    directory services where the students can each use their down account for login.

    If the students are to share a user account, I can see a need to prevent someone
    from leaving and inappropriate wallpaper for the next person. But in all honesty,
    this is more a disciplinary issue than a technological one.
    I am testing the "mandatory" wallpaper setting, I'll let you know how it works.

  3. #3
    Join Date
    Jul 2007
    Location
    Burlington, NC
    Beans
    1,994
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Lockdown Options for Gnome

    This works for the wallpaper, it will even stop Firefox...

    Set it to what is desired in an admin account, then run
    Code:
    gconf-editor
    in the left pane, navigate down to "/desktop/gnome/background,"
    in the right pane, right-click "picture_filename" and choose "Set as Mandatory"
    you will probably also want to do the same for "picture_options"

    It seems the admin account you are in has to log out and back in
    for this restriction to affect it.

    To review all mandatory settings at a later time, run
    Code:
    gksudo gconf-editor
    and open "File -> New Mandatory Window"

  4. #4
    Join Date
    Mar 2010
    Beans
    2

    Re: Lockdown Options for Gnome

    Thanks for the response.

    These are HS kids... they know full well how to use a computer.. and they LOVE to set the desktop wallpapers and delete icons so it ruins the experience for the next user.

    Its a large lab and is not always policed well so I need to lock it down as much as possible.

    Your instructions will help a lot with that.
    Thanks!

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