June 2025
Beginner to intermediate
1180 pages
37h 48m
English
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6.3 man and info
Commands like ls, cp, or top, which you usually run in a terminal window, do not respond to (F1) nor do they have a Help menu. But there are also help texts for these commands available, which can be read via other commands:
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command --help returns a list of all options with a short explanation of their meaning for a large number of commands.
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man command displays the man help text for many commands. You can navigate through the multipage text using the cursor keys. Press (Q) to exit the help.
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help command only works with shell commands, such as cd or alias.
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info command is an alternative to man. The info system is especially suitable for very extensive help texts. Whether the help text is in the man or info system ...
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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.