December 2016
Intermediate to advanced
300 pages
6h 36m
English
Content preview from SELinux System Administration - Second EditionBecome 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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SELinux file context expressions
When we think that the context of a file is wrong, we need to correct the context. SELinux offers several methods to do so, and some distributions even add in more. We can use tools such as chcon, restorecon (together with semanage), setfiles, rlpkg (Gentoo), and fixfiles (RHEL). Of course, we could also use the setfattr command, but that would be the least user-friendly approach for setting contexts.
Using context expressions
In the SELinux policy, there is a list of regular expressions that informs the SELinux utilities and libraries what the context of a file (or other file system resource) should be. Though this expression list is not enforced on the system, it is meant for administrators to see whether a context ...
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