From the category archives:
Rootkit Hunter (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 database, searching for default directories (of rootkits), wrong permissions, hidden files, suspicious strings in kernel modules, and special tests for Linux and FreeBSD.
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Some times you need to copy files or entire contents of directory to another machine, you can use scp command. scp command uses SSH data transfers, so it requires a password or passphrase for authentication.
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If you want to SSH login without password or automate your task between two servers, you need to setup SSH login via certificate.
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