pam_localuser8
Require users to be listed in /etc/passwd
Usage
pam_localuser.so [debug]
[file=/path/passwd]
Overview
pam_localuser is a PAM module to help implementing site-wide login policies, where they typically include a subset of the network's users and a few accounts that are local to a particular workstation. Using pam_localuser and pam_wheel or pam_listfile is an effective way to restrict access to either local users and/or a subset of the network's users.
This could also be implemented using pam_listfile.so and a very short awk script invoked by cron, but it's common enough to have been separated out.
Options
debug
Print debug information.
file=/path/passwd
Use a file other than /etc/passwd.
Module types provided
All module types (account, auth, password and session) are provided.
Return values
PAM_SUCCESS
The new localuser was set successfully.
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_SERVICE_ERR
The user name is not valid or the passwd file is unavailable.
PAM_PERM_DENIED
The user is not listed in the passwd file.
Examples
Add the following lines to /etc/pam.d/su to allow only local users or group wheel to use su.
account sufficient pam_localuser.so account required pam_wheel.so
Files
/etc/passwd
Local user account information.
Releases
10 releases since Debian 5.0 (Lenny); the text changed 8 times.