A number of confined SELinux users are available in Fedora. Each Linux user is mapped to an SELinux user using SELinux policy, allowing Linux users to inherit the restrictions placed on SELinux users, for example (depending on the user), not being able to: run the X Window System; use networking; run setuid applications (unless SELinux policy permits it); or run the
su and
sudo commands. This helps protect the system from the user. Refer to
Section 10.3.3, “Confined and Unconfined Users” for further information about confined users.
10.6.1. Linux and SELinux User Mappings
As the root user, run the following command to view the mapping between Linux users and SELinux users:
~]# semanage login -l
Login Name SELinux User MLS/MCS Range Service
__default__ unconfined_u s0-s0:c0.c1023 *
root unconfined_u s0-s0:c0.c1023 *
system_u system_u s0-s0:c0.c1023 *
In Fedora, Linux users are mapped to the SELinux __default__ login by default (which is in turn mapped to the SELinux unconfined_u user). When a Linux user is created with the useradd command, if no options are specified, they are mapped to the SELinux unconfined_u user. The following defines the default-mapping:
__default__ unconfined_u s0-s0:c0.c1023 *
