pam_motd.so  [
        motd=/path/filename
      ]
      pam_motd is a PAM module that can be used to display
      arbitrary motd (message of the day) files after a successful
      login. By default the /etc/motd file is
      shown. The message size is limited to 64KB.
    
      The suggested usage for /etc/pam.d/login is:
      
session  optional  pam_motd.so  motd=/etc/motd