Provided by: libpam-modules_1.5.2-2ubuntu1_amd64
pam_localuser - require users to be listed in /etc/passwd
pam_localuser.so [debug] [file=/path/passwd]
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.
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.
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.
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
/etc/passwd Local user account information.
pam.conf(5), pam.d(5), pam(7)
pam_localuser was written by Nalin Dahyabhai <email@example.com>.