In a nutshell,
caches successful authentication attempts, and allows you to use a recent successful attempt as the basis for authentication. This is similar mechanism which is used in
When an application opens a session using
pam_timestamp, a timestamp file is created in the
directory for the user. When an application attempts to authenticate the user, a
will treat a sufficiently recent timestamp file as grounds for succeeding.
How long should pam_timestamp treat timestamp as valid after their last modification date (in seconds). Default is 300 seconds.
Attempt to inform the user when access is granted.