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SELinux System Administration - Second Edition by Sven Vermeulen

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Distinguishing between policies

The most common SELinux policy store names are strict, targeted, mcs, and mls. None of the names assigned to policy stores are fixed, though, so it is a matter of convention. Hence, it is recommended to consult the distribution documentation to verify what the proper name of the policy should be. Still, the name often provides some information about the SELinux options that are enabled through the policy.

Supporting MLS

One of the options that can be enabled is MLS support. If it is disabled, then the SELinux context will not have a fourth field with sensitivity information in it, making the contexts of processes and files look as follows:

    staff_u:sysadm_r:sysadm_t 

To check whether or not MLS is enabled, it is ...

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