pam_unix
provides standard Unix authentication
TLDR
Standard Unix authentication
$ auth required pam_unix.so
Password management$ password required pam_unix.so sha512 shadow
Session management$ session required pam_unix.so
Null password check$ auth required pam_unix.so nullok
SYNOPSIS
pam_unix.so [options]
DESCRIPTION
pam_unix provides standard Unix authentication. Uses /etc/passwd and shadow.The module handles basic auth. Core PAM component.
PARAMETERS
nullok
Allow empty passwords.sha512
Use SHA-512 hashing.shadow
Use shadow passwords.remember=N
Remember N passwords.try_first_pass
Use previous password.
CAVEATS
Core PAM module. Configuration critical. Hash algorithm choice.
HISTORY
pam_unix provides traditional Unix authentication via passwd/shadow.
