pam_echo.so [
file=/path/message
]
The pam_echo PAM module is for printing text messages to inform user about special things. Sequences starting with the % character are interpreted in the following way:
The name of the remote host (PAM_RHOST).
The name of the local host.
The service name (PAM_SERVICE).
The name of the controlling terminal (PAM_TTY).
The remote user name (PAM_RUSER).
The local user name (PAM_USER).
All other sequences beginning with % expands to the characters following the % character.
file=/path/message
The content of the file /path/message
will be printed with the PAM conversion function as PAM_TEXT_INFO.