|selinux_config(5)||SELinux configuration file||selinux_config(5)|
config - The SELinux sub-system configuration file.
The SELinux config file controls the state of SELinux regarding:
- The policy enforcement status - enforcing, permissive or disabled.
- The policy name or type that forms a path to the policy to be loaded and its supporting configuration files.
- How SELinux-aware login applications should behave if no valid SELinux users are configured.
- Whether the system is to be relabeled or not.
The entries controlling these functions are described in the FILE FORMAT section.
The fully qualified path name of the SELinux configuration file is /etc/selinux/config.
If the config file is missing or corrupt, then no SELinux policy is loaded (i.e. SELinux is disabled).
The sestatus (8) command and the libselinux function selinux_path (3) will return the location of the config file.
The config file supports the following parameters:
SELINUXTYPE = policy_name
REQUIRESEUSERS = 0 | 1
AUTORELABEL = 0 | 1
- SELinux security policy is enforced.
- SELinux security policy is not enforced but logs the warnings (i.e. the action is allowed to proceed).
- No SELinux policy is loaded. This option was used to disable SELinux completely, which is now deprecated. Use the selinux=0 kernel boot option instead (see selinux(8)).
The policy_name is then appended to this and becomes the 'policy root' location that can be retrieved by selinux_policy_root_path(3). An example entry retrieved is:
The actual binary policy is located relative to this directory and
also has a policy name pre-allocated. This information can be retrieved
using selinux_binary_policy_path(3). An example entry retrieved by
The binary policy name has by convention the SELinux policy
version that it supports appended to it. The maximum policy version
supported by the kernel can be determined using the sestatus(8)
command or security_policyvers(3). An example binary policy file with
the version is:
It is checked by getseuserbyname(3) that is called by SELinux-aware login applications such as PAM(8).
If set to 0 or the entry missing:
If set to 1:
If set to 0 and there is a file called .autorelabel in the root directory, then on a reboot, the loader will drop to a shell where a root login is required. An administrator can then manually relabel the file system.
If set to 1 or no entry present (the default) and there is a .autorelabel file in the root directory, then the file system will be automatically relabeled using fixfiles -F restore
In both cases the /.autorelabel file will be removed so that relabeling is not done again.
This example config file shows the minimum contents for a system to run SELinux in enforcing mode, with a policy_name of 'targeted':
SELINUXTYPE = targeted
selinux(8), sestatus(8), selinux_path(3), selinux_policy_root_path(3), selinux_binary_policy_path(3), getseuserbyname(3), PAM(8), fixfiles(8), selinux_mkload_policy(3), selinux_getpolicytype(3), security_policyvers(3), selinux_getenforcemode(3), seusers(5)
|18 Nov 2011||Security Enhanced Linux|