A number of confined SELinux users are available in Fedora 10. Each Linux user is mapped to an SELinux user via SELinux policy, allowing Linux users to inherit the restrictions 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 to become the Linux root user. This helps protect the system from the user. Refer to Section 4.3, “Confined and Unconfined Users” for further information about confined users in Fedora 10.
6.1. Linux and SELinux User Mappings
As the Linux root user, run the semanage login -l command to view the mapping between Linux users and SELinux users:
# /usr/sbin/semanage login -l
Login Name SELinux User MLS/MCS Range
__default__ unconfined_u s0-s0:c0.c1023
root unconfined_u s0-s0:c0.c1023
system_u system_u s0-s0:c0.c1023
In Fedora 10, Linux users are mapped to the SELinux __default__ login by default (which is 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:
