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Linux 2.6 - man page for pam_timestamp (linux section 8)

PAM_TIMESTAMP(8)						 Linux-PAM Manual						  PAM_TIMESTAMP(8)

NAME
pam_timestamp - Authenticate using cached successful authentication attempts
SYNOPSIS
pam_timestamp.so [timestamp_timeout=number] [verbose] [debug]
DESCRIPTION
In a nutshell, pam_timestamp 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 sudo. When an application opens a session using pam_timestamp, a timestamp file is created in the timestampdir directory for the user. When an application attempts to authenticate the user, a pam_timestamp will treat a sufficiently recent timestamp file as grounds for succeeding.
OPTIONS
timestamp_timeout=number How long should pam_timestamp treat timestamp as valid after their last modification date (in seconds). Default is 300 seconds. verbose Attempt to inform the user when access is granted. debug Turns on debugging messages sent to syslog(3).
MODULE TYPES PROVIDED
The auth and session module types are provided.
RETURN VALUES
PAM_AUTH_ERR The module was not able to retrieve the user name or no valid timestamp file was found. PAM_SUCCESS Everything was successful. PAM_SESSION_ERR Timestamp file could not be created or updated.
NOTES
Users can get confused when they are not always asked for passwords when running a given program. Some users reflexively begin typing information before noticing that it is not being asked for.
EXAMPLES
auth sufficient pam_timestamp.so verbose auth required pam_unix.so session required pam_unix.so session optional pam_timestamp.so
FILES
/var/run/sudo/... timestamp files and directories
SEE ALSO
pam_timestamp_check(8), pam.conf(5), pam.d(5), pam(8)
AUTHOR
pam_tally was written by Nalin Dahyabhai. Linux-PAM Manual 06/04/2011 PAM_TIMESTAMP(8)

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