03-28-2014
That you have 53 users using sudo, is certainly far better than 53 users using root!
sudo does not appear to support this directly, but sudo uses pam, which does have time-based limits. I'm not quite sure how to apply them here however.
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LEARN ABOUT CENTOS
pam_timestamp
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_timestamp was written by Nalin Dahyabhai.
Linux-PAM Manual 09/19/2013 PAM_TIMESTAMP(8)