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CHECKMODULE(8)                                                  CHECKMODULE(8)

       checkmodule - SELinux policy module compiler

       checkmodule [-h] [-b] [-m] [-M] [-U handle_unknown ] [-V] [-o output_file] [input_file]

       This manual page describes the checkmodule command.

       checkmodule  is  a  program that checks and compiles a SELinux security policy module into a binary representa-
       tion.  It can generate either a base policy module (default) or a non-base policy  module  (-m  option);  typi-
       cally, you would build a non-base policy module to add to an existing module store that already has a base mod-
       ule 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.

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

              Print usage.

       -m     Generate a non-base policy module.

              Enable the MLS/MCS support when checking and compiling the policy module.

               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 permissions (deny, allow or reject).

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

       semodule(8), semodule_package(8) SELinux documentation at,  especially  "Configuring
       the SELinux Policy".

       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  <>.