require users to be listed in /etc/passwd
' pam_localuser.so 'u 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 (Aqs 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 (Aqs users .
This could also be implemented using pam_listfile .so and a very short awk script invoked by cron, but it (Aqs common enough to have been separated out .
debug Print debug information .
file= /path/passwd Use a file other than /etc/passwd .
All module types ( account , auth , password and session )are provided .
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 .
Add the following lines to /etc/pam .d/su to allow only local users or group wheel to use su ..RS 4
account sufficient pam_localuser .so account required pam_wheel .so
/etc/passwd Local user account information .
pam.conf(5), pam.d(5), pam(8)
pam_localuser was written by Nalin Dahyabhai <nalin@redhat .com> .