New answers tagged administration
As far as I know you can reset all settings of gnome and related things but if you are talking about package management and all then I think it is difficult! The best way is to create two accounts One as Administrator and other as Student. Don't add this student user into any sudoers file etc.i.e don't give root access to student account So that These ...
The easy way would be using the Guest account. The home directory for that user is completely wiped after each logout (some technical details in this answer here on AskUbuntu). Also, the Guest user has no access to system-critical settings and thus can't change anything of relevance.
Just sign in with a guest account. Nothing is saved after you log out.
Alexander did not tell, which version of Ubuntu he uses ? There were some versions (at 12.04 and 12.10) which had a non-perfect package of apt-get and apt-get there needed to be fixed. In this case you can use synaptic, to update or re-install apt-get. --- But this is only necessary if apt-get is broken or buggy somehow.
You need to run it as root : sudo apt-get install ... then type your password you can run any command as root, you just need to begin with sudo
@Alexander, According to Debian wiki, this error indicates two causes An attempt is being made to run more than one package management process or A non-root user is trying to add or remove packages If you are trying to use two of the Ubuntu Software Center, apt, Synaptic Package Manager and dpkg at the same time, you should close one of them ...
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