September 2014
Intermediate to advanced
240 pages
5h 53m
English
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Using cron with SELinux
Another example of an SELinux-aware application is cron. Well, actually a set of cron implementations, as there is not a single cron application. Examples of cron implementations are vixie-cron, cronie, and fcron.
The cron implementations invoke commands for (and as) a particular Linux user. As these commands are not set in stone (the main purpose of cron is to allow any command to be run for a particular user or even for the system itself), it is not possible to easily create a policy that is sufficiently fine-grained to accommodate all features provided by cron. After all, for SELinux itself, there is no difference between cron calling a command for one user or another: all that is involved is the cron domain (crond_t ...
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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.
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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.