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Full Discussion: Filter records from a log file based on timestamp
Top Forums UNIX for Beginners Questions & Answers Filter records from a log file based on timestamp Post 303043164 by mukulverma2408 on Monday 20th of January 2020 10:58:50 AM
Old 01-20-2020
Filter records from a log file based on timestamp
Dear Experts,

I have a log file that contains a timestamp, I would like to filter record from that file based on timestamp. For example refer below file -
cat sample.txt
Code:
Jan 19 20:51:48 mukul-Vostro-14-3468 systemd: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Jan 19 20:54:48 mukul-Vostro-14-3468 su[806]: pam_unix(su:session): session closed for user root
Jan 19 20:57:48 mukul-Vostro-14-3468 systemd-logind[1048]: Removed session c49.
Jan 19 20:59:48 mukul-Vostro-14-3468 su[854]: Successful su for root by root
Jan 19 20:57:48 mukul-Vostro-14-3468 su[854]: + ??? root:root
Jan 19 21:05:48 mukul-Vostro-14-3468 su[854]: pam_unix(su:session): session opened for user root by (uid=0)
Jan 19 21:10:48 mukul-Vostro-14-3468 systemd-logind[1048]: New session c50 of user root.
Jan 19 21:12:48 mukul-Vostro-14-3468 systemd: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Jan 19 21:15:49 mukul-Vostro-14-3468 su[854]: pam_unix(su:session): session closed for user root

Out of this file i would like to filter record before 21:10 hrs.

Any help is appreciated.
 

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LEARN ABOUT POSIX

systemd-logind.service

SYSTEMD-LOGIND.SERVICE(8)				      systemd-logind.service					 SYSTEMD-LOGIND.SERVICE(8)

NAME

       systemd-logind.service, systemd-logind - Login manager

SYNOPSIS

       systemd-logind.service

       /lib/systemd/systemd-logind

DESCRIPTION

       systemd-logind is a system service that manages user logins. It is responsible for:

       o   Keeping track of users and sessions, their processes and their idle state. This is implemented by allocating a systemd slice unit for
	   each user below user.slice, and a scope unit below it for each concurrent session of a user. Also, a per-user service manager is
	   started as system service instance of user@.service for each logged in user.

       o   Generating and managing session IDs. If auditing is available and an audit session ID is already set for a session, then this ID is
	   reused as the session ID. Otherwise, an independent session counter is used.

       o   Providing PolicyKit-based access for users for operations such as system shutdown or sleep

       o   Implementing a shutdown/sleep inhibition logic for applications

       o   Handling of power/sleep hardware keys

       o   Multi-seat management

       o   Session switch management

       o   Device access management for users

       o   Automatic spawning of text logins (gettys) on virtual console activation and user runtime directory management

       User sessions are registered with logind via the pam_systemd(8) PAM module.

       See logind.conf(5) for information about the configuration of this service.

       See sd-login(3) for information about the basic concepts of logind such as users, sessions and seats.

       See the logind D-Bus API Documentation[1] for information about the APIs systemd-logind provides.

       For more information on the inhibition logic see the Inhibitor Lock Developer Documentation[2].

SEE ALSO

       systemd(1), systemd-user-sessions.service(8), loginctl(1), logind.conf(5), pam_systemd(8) sd-login(3)

NOTES

	1. logind D-Bus API Documentation
	   https://www.freedesktop.org/wiki/Software/systemd/logind

	2. Inhibitor Lock Developer Documentation
	   https://www.freedesktop.org/wiki/Software/systemd/inhibit

systemd 237														 SYSTEMD-LOGIND.SERVICE(8)
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