Linked Questions

658
votes
15answers
2.3m views

How do I reset a lost administrative password?

I'm working on a Ubuntu system, and my client has completely forgotten his administrative password. He doesn't even remember entering one; however it is there. I've tried the suggestions on the ...
114
votes
3answers
242k views

How do I change file system in recovery mode to read-write mode?

I have messed up my sudoers file and I want to change the permission on it. When I login in recovery mode, I cannot run the command chmod as it is read-only option. I tried mount -o remount,rw / in ...
115
votes
3answers
26k views

Why should users never use normal sudo to start graphical applications?

I've read the comunity "RootSudo" documentation and am interested in this line: You should never use normal sudo to start graphical applications as Root. Why? What is the difference? Please ...
64
votes
5answers
64k views

How do I add myself back as a sudo user?

I clean-installed Ubuntu 11.10 today, and then installed VirtualBox. This required me to add myself to the vboxusers group, and since 11.10 seems to no longer have a graphical app to add users to a ...
100
votes
2answers
126k views

Why is gksu no longer installed by default?

I have always recommended pressing ALT+F2 and typing for example gksu nautilus or gksudo nautilus both are equivalent; to run graphical programs with root privileges. However, I have just installed ...
73
votes
1answer
167k views

How do I boot into a root shell?

When booting to the graphical desktop fails we sometimes are recommended to boot into a "root shell" or to boot in "recovery mode". How do I do that?
31
votes
3answers
129k views

How do I reset a lost password (using recovery mode requires me to type the password)?

I need to reset my password. I have followed these steps: How do I reset a lost administrative password? However, then I go to "root" or "netroot" recovery options, it tells me: Give root password ...
6
votes
3answers
39k views

Password not working for sudo (“Authentication failure”)

Before I mention anything further, DO NOT give me a response saying that terminal won't show password input. I'm AWARE of that. I'm typing my user password in (not a capslock issue), and for some ...
9
votes
3answers
10k views

How can I configure “mousekeys”?

Under 11.04, the option to control the pointer with the numpad was set in the Hardware/Keyboard settings page. How can I turn on mousekeys or configure them in newer releases?
3
votes
1answer
1k views

Polkit not accepting my credentials

I am having trouble authenticating via policy kit. Sudo works just fine. In reference to this previous question, here is my output of $ ps aux | grep [p]olkit pkcheck --action-id org.freedesktop....