December 2012
Intermediate to advanced
888 pages
48h 24m
English
Content preview from Ubuntu Unleashed 2013 Edition: Covering 12.10 and 13.04, Eighth Edition
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Understanding and Fixing sudo
Most Ubuntu users never have a problem here, but sometimes, people who like to experiment break things, especially while learning. This section exists to help you first understand more completely how sudo works and also how to restore sudo access to a specific user when, for some reason, it has ceased to function for that user.
Note
You will usually know a problem has occurred because an error message like this will appear when a user tries to issue a command using sudo:
matthew@seymour:~$ sudo shutdown -h now[sudo] password for matthew:matthew is not in the sudoers file. This incident will be reported.
Sometimes, you might not even receive an error message, but the command issued simply does nothing. Either way, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.