pam_localuser — require users to be listed in /etc/passwd
Synopsis
pam_localuser.so [debug] [file=/path/passwd]
Description
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_SERVICE_ERR
No username was given.
- 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.
See Also
pam.conf(5), pam.d(5), pam(8)