# phpman > man > pam_usertype(8)

[PAM_USERTYPE(8)](https://www.chedong.com/phpMan.php/man/PAMUSERTYPE/8/markdown)                               Linux-PAM                              [PAM_USERTYPE(8)](https://www.chedong.com/phpMan.php/man/PAMUSERTYPE/8/markdown)



## NAME
       pam_usertype - check if the authenticated user is a system or regular account

## SYNOPSIS
       **pam**___**usertype.so** [_flag_...] {_condition_}

## DESCRIPTION
       pam_usertype.so is designed to succeed or fail authentication based on type of the account of
       the authenticated user. The type of the account is decided with help of _SYS_UID_MIN_ and
       _SYS_UID_MAX_ settings in _/etc/login.defs_. One use is to select whether to load other modules
       based on this test.

       The module should be given only one condition as module argument. Authentication will succeed
       only if the condition is met.

## OPTIONS
       The following _flag_s are supported:

       **use**___**uid**
           Evaluate conditions using the account of the user whose UID the application is running
           under instead of the user being authenticated.

### audit
           Log unknown users to the system log.

       Available _condition_s are:

### issystem
           Succeed if the user is a system user.

### isregular
           Succeed if the user is a regular user.

## MODULE TYPES PROVIDED
       All module types (**account**, **auth**, **password** and **session**) are provided.

## RETURN VALUES
       PAM_SUCCESS
           The condition was true.

       PAM_BUF_ERR
           Memory buffer error.

       PAM_CONV_ERR
           The conversation method supplied by the application failed to obtain the username.

       PAM_INCOMPLETE
           The conversation method supplied by the application returned PAM_CONV_AGAIN.

       PAM_AUTH_ERR
           The condition was false.

       PAM_SERVICE_ERR
           A service error occurred or the arguments can't be parsed correctly.

       PAM_USER_UNKNOWN
           User was not found.

## EXAMPLES
       Skip remaining modules if the user is a system user:

           account sufficient pam_usertype.so issystem


## SEE ALSO
       [**login.defs**(5)](https://www.chedong.com/phpMan.php/man/login.defs/5/markdown), [**pam**(8)](https://www.chedong.com/phpMan.php/man/pam/8/markdown)

## AUTHOR
       Pavel Březina <<pbrezina@redhat.com>>



Linux-PAM                                    06/08/2020                              [PAM_USERTYPE(8)](https://www.chedong.com/phpMan.php/man/PAMUSERTYPE/8/markdown)