---
name: "pam_echo"
section: "8"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/pam_echo"
---

# pam\_echo(8)

Echo PAM module

## NAME

**pam\_echo** – Echo PAM module

## SYNOPSIS

\[*service-name*\] *module-type* *control-flag* *pam\_echo* \[*arguments*\]

## DESCRIPTION

The echo service module for PAM displays its arguments to the user, separated by spaces, using the current conversation function.

If the **%** character occurs anywhere in the arguments to **pam\_echo**, it is assumed to introduce one of the following escape sequences:

- **%H**

  The name of the host on which the client runs (PAM\_RHOST).

- **%s**

  The current service name (PAM\_SERVICE).

- **%t**

  The name of the controlling tty (PAM\_TTY).

- **%U**

  The applicant's user name (PAM\_RUSER).

- **%u**

  The target account's user name (PAM\_USER).

Any other two-character sequence beginning with **%** expands to the character following the **%** character.

## SEE ALSO

[pam(3)](/pam/3.md), [pam.conf(5)](/pam.conf/5.md)

## AUTHORS

The **pam\_echo** module and this manual page were developed for the FreeBSD Project by ThinkSec AS and NAI Labs, the Security Research Division of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (“CBOSS”), as part of the DARPA CHATS research program.