42.4.6.2. Common pam_timestamp Directives
The pam_timestamp.so module accepts several directives. The following are the two most commonly used options:
timestamp_timeout — Specifies the period (in seconds) for which the timestamp file is valid. The default value is 300 (five minutes).
timestampdir — Specifies the directory in which the timestamp file is stored. The default value is /var/run/sudo/.
Refer to Section 42.4.8.1, “Installed Documentation” for more information about controlling the pam_timestamp.so module.