December 2008
Intermediate to advanced
320 pages
6h 45m
English
Content preview from Expert Shell Scripting
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CHAPTER 37A Pseudo–shadow File
Some environments do not use a shadow file for maintaining passwords. These environments keep encrypted passwords in either a local passwd file or one that is handled through NIS. I have seen this mode of operation in several versions of HP-UX and NIS. NIS can support using a shadow file, but not all NIS clients have this capability.
The script in this chapter, which is intended to be run daily, creates and maintains a pseudo–shadow file to track the age of user passwords and their change history. The script does not, however, remove the encrypted password from the already-existing passwd file.
I intend this contrived shadow-file generator to be run in conjunction with the password-aging script in Chapter 36. The ...
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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.