October 2000
Intermediate to advanced
1152 pages
26h 41m
English
Content preview from Red Hat® Linux® 7 UnleashedBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using NISisms in Your /etc/passwd File
The most popular use of NIS is to keep a global user database so that it is possible to grant access to any machine at your site to any user. Under Red Hat Linux, this behavior is implicit for all NIS clients.
Sometimes, however, you do not want everyone accessing certain systems, such as those used by personnel. You can fix this access by using the special token + in your /etc/passwd file. By default, NIS clients have the line +:::::: at the end of their /etc/passwd file, thereby allowing everyone in NIS to log in to the system. To arrange that the host remains a NIS client but does not grant everyone permission, change the line to read +::::::/bin/false. This will allow only people with actual entries ...
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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.