Every pen test begins with information gathering. Give yourself a head start with the Shodan search engine and its powerful toolkit.

SSH brute-force attacks are still a major threat to Linux servers in 2025. Learn how to block them with key-only logins, Fail2ban, iptables, knockd, and more.

Linux is in constant flux, which naturally affects the boot process. Bootloaders such as GRUB are slowly being replaced with a faster, more secure boot process.

Keep your passwords and other sensitive information safe with the open source Bitwarden password manager.

Do you need a simple solution to block ads, trackers, phishing, and malware sites on your local network? Configure AdGuard Home as your DNS server for comprehensive network protection.

Use the kernel auditing system to set watches on critical files and system calls and log the activity for later anaylsis.