NAME checkmodule - SELinux policy module compiler

SYNOPSIS checkmodule [-h] [-b] [-m] [-M] [-U handle_unknown ] [-V] [-o out- put_file] [input_file]

DESCRIPTION This manual page describes the checkmodule command.

checkmodule is a program that checks and compiles a SELinux security policy module into a binary representation. It can generate either a base policy module (default) or a non-base policy module (-m option); typically, you would build a non-base policy module to add to an exist- ing module store that already has a base module provided by the base policy. Use semodule_package to combine this module with its optional file contexts to create a policy package, and then use semodule to install the module package into the module store and load the resulting policy.

OPTIONS -b,--binary Read an existing binary policy module file rather than a source policy module file. This option is a development/debugging aid.

-h,--help Print usage.

-m Generate a non-base policy module.

-M,--mls Enable the MLS/MCS support when checking and compiling the pol- icy module.

-V,--version Show policy versions created by this program

-o,--output filename Write a binary policy module file to the specified filename. Otherwise, checkmodule will only check the syntax of the module source file and will not generate a binary module at all.

-U,--handle-unknown <action> Specify how the kernel should handle unknown classes or permis- sions (deny, allow or reject).

EXAMPLE # Build a MLS/MCS-enabled non-base policy module. $ checkmodule -M -m httpd.te -o httpd.mod

SEE ALSO semodule(8), semodule_package(8) SELinux documentation at, especially "Configuring the SELinux Pol- icy".

AUTHOR This manual page was copied from the checkpolicy man page written by Arpad Magosanyi <>, and edited by Dan Walsh <>. The program was written by Stephen Smalley <>.