Rkhunter is a very useful tool that is used to check for trojans, rootkits, and other security problems.
Rkhunter is a very useful tool that is used to check for trojans, rootkits, and other security problems. This tutorial will touch on installing and setting up a daily report for rkhunter.
Update Aug. 23, 2005
tar -zxvf rkhunter-1.2.7.tar.gz
Now you can run a test scan with the following command:
add the following replacing your email address:
(/usr/local/bin/rkhunter -c --cronjob 2>&1 | mail -s "Daily Rkhunter Scan Report" email@example.com)
chmod +x /etc/cron.daily/rkhunter.sh
gets the latest database updates from their central server and matches your OS better to prevent false positives.
False positives are warnings which indicates there is a problem, but aren't really a problem. Example: some Linux distro updated a few common used binaries like `ls` and `ps`. You (as a good sysadmin) update the new packages and run (ofcourse) daily Rootkit Hunter. Rootkit Hunter isn't yet aware of these new files and while scanning it resports some "bad" files. In this case we have a false positive. You could always have your datacenter or a system administrator check out the server to verify that it is not compromised.
More information on rkhunter can be found here: http://www.rootkit.nl
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