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As administrator I want to be sure user can not download inappropriate applications.

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Look at System -->Admin -->Uers and Groups. Highlight the user and click Preperties, lok at the user privileges tab. –  Mitch Aug 28 '12 at 11:19

2 Answers 2

If "user" is not an administrator they will not be able to install software without the administrator password.

Go to System Settings > User Accounts, click unlock at the top and change "user" to standard if needed.

user accounts

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Since user needs administration rights to install software, you can remove him from sudoers. Use command visudo to open sudoers file and remove the user you want.

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Very graceful. :) You need root access to edit visudo. –  loklaan Aug 28 '12 at 11:20
    
link: [Remove sudoers discusson on linuxquestions] (linuxquestions.org/questions/linux-newbie-8/…) –  Jaroslav Bucko Aug 28 '12 at 11:21
    
@loklaan Just as a heads-up, visudo is not edited; it calls an editor, and checks syntax after edits are complete. –  hexafraction Aug 29 '12 at 17:45

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