In this page i will try to provide some of the must have tools for linux OS. Some of these tools can also be used for FreeBsd:
ROOT KIT HUNTERS:
Installation how to
* CHKROOTKIT
* RKHUNTER
* ROOTCHECK
@RootCheck:
You can download the rootcheck latest version from the following URL:
http://www.ossec.net/rootcheck/files/
Installation how to:
tar -zxvf rootcheck-0.7.tar.gz ( whatever version you have downloded)
cd rootcheck-0.7
make all ( you have to answer some of the question that will be fired on you on this step )
This will install the two files on the same directory(ossec-rootcheck & rootcheck.conf).
Use any one of the commands to analyse you server:
ossec-rootcheck -c rootcheck.conf
OR
ossec-rootcheck -s ( to scan the entire system– I will suggest this option)
Check with the README file for any further query’s