Wanna audit your Files in Linux Systems !! – Part 1

Its so simple …

What audit means – Check who made changes to a file like read or write !!

A daemon named auditd is in the linux kernel which is responsible for auditining the predefined files according to the rules defined in /etc/audit.rules ,but it can be customized for desired files .

It’s installed by default , if not then.

#yum install audit

Start the daemon if not started

#service auditd start

Make the daemon to start while system boots ,

#chkconfig auditd on

Customize for desired files to be audited
auditctl : The command used for controlling the kernelโ€™s audit system to get status, and add or delete rules into kernel audit system. Set a a watch on the desired file to be audited as :

# auditctl -w /usr/sbin/crond -p rwxa -k cron-daemon

Where
-w : optioon used to watch the file /usr/sbin/crond
-p : set permission to watch the file ,here w – write , r – read , x – execute , a- append
-k : set a filter key (a string upto 31 chars long) used to uniquely identify the audit records produced by watch

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