rkhunter
Software
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rkhunter is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. It does this by comparing SHA-1 hashes of important files with known good ones in online databases, searching ... Wikipedia
Initial release: 2006; 18 years ago
License: GNU General Public License
Operating system: Unix-like
Stable release: 1.4.6 / 20 February 2018; 6 years ago
Written in: Bourne shell, Perl