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SSH Hardening — Keys, sshd_config, and Brute-Force Protection
Complete step-by-step guide to securing SSH access on Linux servers using Ed25519 keys, disabling passwords, hardening daemon configuration, and testing.
Fail2ban — Protect SSH and Web Services from Brute Force
Install, configure, and operate fail2ban to automatically block malicious IP addresses attempting brute-force logins.
tmux — Terminal Multiplexer for Persistent SSH Sessions
Complete beginner guide to tmux, managing persistent sessions across SSH disconnects, splitting terminal panes, keyboard shortcuts, and configuration.
screenfetch — System Information & ASCII Art Tool
Complete beginner guide to screenfetch, displaying Linux distribution ASCII logos, hardware specifications, uptime, and configuring SSH MOTD welcome banners.
UFW Basics — Default-Deny Firewall on Ubuntu & Debian
Step-by-step beginner guide to configuring Ubuntu's Uncomplicated Firewall (UFW), command breakdown, rules, port syntax, and avoiding SSH lockout.