July 2007
Beginner
347 pages
4h 40m
English
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Chapter 27. Information, Please
There are lots of ways the CLI can help you. Often, you don’t need to do something so much as you need to know something. In this chapter, we’ll take a quick look at several commands—whereis, whatis, df, kernelversion, ifconfig, route, and last—that can quickly answer questions about your system or configuration.
Whereis That Darn Command?
You know the command is on your system, because you’ve used it before. But now you can’t remember where it lives. Is it in /sbin? Or /usr/bin? Somewhere else?
The whereis command is designed to answer that very question. In fact, whereis will tell you not only where to find the executable command, but the source code—if it’s present—and man pages as well. All you need to do is ask, ...
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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.