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GRADM(8) System Manager's Manual GRADM(8)


gradm - Administration program for the grsecurity RBAC system


gradm [ -E ] [ -R ] [ -C ] [ -F ] [ -L <logfile> ] [ -O <filename|stream> ] [ -M <filename|uid> ] [ -D ] [ -P [rolename] ] [ -a <rolename> ] [ -n <rolename> ] [ -p <rolename> ] [ -u ] [ -V ] [ -h ] [ -v ]


gradm is the userspace RBAC parsing and authentication program for grsecurity

grsecurity aims to be a complete security system for Linux 2.4. gradm performs several tasks for the RBAC system including authenticated via a password to the kernel and parsing rules to be passed to the kernel.


Enable the RBAC system
Reload the RBAC system (only valid while in admin mode)
Perform a check of the RBAC policy, running the same analysis against it that is performed when enabling.
Toggle full learning mode. If used only with -L, it enables the RBAC system in full learning mode. If used with -L and -O, it parses the full learning logs and generates a complete ruleset.
Remove an execution ban on a given uid or filename that has been put in place by the RES_CRASH resource restriction of the RBAC system.
Parses the learning logs. Accepts an argument which specifies the logfile to scan for the learning logs. If "-" is specified as the logfile, stdin will be used as the learning log. This option can be used with -E, -O, or -F.
Specifies output mode. Requires a single argument that can be "stdout", "stderr", or a regular file. Only used with -L or -F.
Disable the RBAC system
Without an argument, it sets the password for administering the RBAC system. With a role name as an argument, it sets the password for that given special role.
Authenticate to a special role that requires a password.
Authenticate to a special role that does not require a password.
Authenticate through PAM to a special role.
Removes yourself from your current special role, reverting back to the normal role selection. To be used, for instance, for logging out of an admin role without exiting your shell.
Displays verbose policy statistics when enabling the RBAC system or checking the RBAC policy. Can only be used with -C, -E, or -F -L <filename>
Display help information
Print version information and exit


Please include as much information as possible(using any available debugging options) and send bug reports for gradm or the grsecurity RBAC system to


grsecurity and gradm were created and are maintained by Brad Spengler <>