http://www.greycipher.dev/categories/linux/Recent content in Linux onHugo -- gohugo.ioengreycipher@tutanota.com (GreyCipher)greycipher@tutanota.com (GreyCipher)© 2026 GreyCipherSat, 16 May 2026 09:12:33 +0200http://www.greycipher.dev/posts/otw-leviathan-2/Sat, 16 May 2026 09:12:33 +0200greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-leviathan-2/A beginner-friendly walkthrough of levels 4-7 in the Leviathan wargame from OverTheWire. Learn how to decode binary output, abuse symbolic links and write your first brute force script to crack a 4-digit PIN.http://www.greycipher.dev/posts/otw-leviathan-1/Sun, 10 May 2026 10:52:23 +0200greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-leviathan-1/A beginner-friendly walkthrough of Levels 0-3 in the Leviathan wargame from OverTheWire. Learn how to trace binary execution with ltrace, understand SUID permissions and exploit a race condition vulnerability, these are the first real steps in binary analisys.http://www.greycipher.dev/posts/otw-bandit-7/Sun, 12 Apr 2026 08:42:29 +0200greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-7/Walkthrough of Levels 27–33 in the OverTheWire Bandit wargame. Learn essential git commands for security work: cloning, log inspection, branch exploration, tags, stash, and push, then escape an uppercase shell.http://www.greycipher.dev/posts/otw-bandit-6/Sun, 05 Apr 2026 08:45:44 +0200greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-6/Walkthrough of Levels 25-27 in te OverTheWire Bandit wargame. Learn how to identify and escape restricted shells, abuse the more pager to spawn a shell, and use vim as a shell escape vector.http://www.greycipher.dev/posts/otw-bandit-5/Sun, 29 Mar 2026 16:47:30 +0200greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-5/Walkthrough of Levels 21–25 in the OverTheWire Bandit wargame. Learn how to read cron jobs, reverse-engineer shell scripts, write your own scripts, and brute-force a 4-digit PIN with a bash loop.http://www.greycipher.dev/posts/otw-bandit-4/Sun, 22 Mar 2026 15:37:38 +0100greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-4/Walkthrough of Levels 16–20 in the OverTheWire Bandit wargame. Learn port scanning, SSL/TLS service identification, file diffing, bypassing modified shell configs, and Linux setuid binaries.http://www.greycipher.dev/posts/otw-bandit-3/Sun, 08 Mar 2026 17:48:38 +0100greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-3/Walkthrough of Levels 10-15 in the OverTheWire Bandit wargame. Learn how to decode base64, reverse ROT13, decompress layered archives, use SSH keys and communicate with local network services.http://www.greycipher.dev/posts/otw-bandit-2/Sun, 08 Mar 2026 15:59:51 +0100greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-2/Walkthrough of Levels 5–10 in the OverTheWire Bandit wargame. Learn how to search for files by properties, filter text with grep, sort and deduplicate data, extract readable strings from binary files, and decode base64.http://www.greycipher.dev/posts/ssh/Sat, 28 Feb 2026 15:58:26 +0100greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/ssh/A practical guide to SSH covering basic connections, key authentication, the config file, and common troubleshooting for Linux users.http://www.greycipher.dev/posts/otw-bandit-1/Sat, 28 Feb 2026 10:12:15 +0100greycipher@tutanota.com (GreyCipher)http://www.greycipher.dev/posts/otw-bandit-1/A beginner-friendly walkthrough of Levels 0–4 in the Bandit wargame from OverTheWire. Learn essential Linux command-line skills, SSH basics, file navigation, and how to handle hidden and oddly named files, all while building your cybersecurity foundation through hands-on practice.