June 2025
Beginner to intermediate
1180 pages
37h 48m
English
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14.6 PAM, NSS, and Nscd
After presenting the principles of user and group management in the previous section, here are a few more technical details. The following procedures are represented by the three abbreviations in the heading:
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PAMPluggable authentication modules (PAMs) are central libraries that provide authentication functions to various commands.
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NSSThe name service switch (NSS) decides which sources are used to resolve user, group, and host names.
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NscdThe Name Service Caching Daemon (nscd) is a cache for name queries. It can make the most recently required user, group, and host names available again particularly quickly.
14.6.1 PAM
A PAM is a library whose functions provide help with authentication tasks. When you perform ...
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