{"repo":"learntocloud/linux-ctfs","free":true,"listed":false,"github":"https://github.com/learntocloud/linux-ctfs","clone":"git clone https://github.com/learntocloud/linux-ctfs.git","description":"A collection of Linux CTFs to practice your CLI skills","language":"Python","stars":271,"topics":["bash","cli","l2c","linux"],"license":"MIT","category":"cli-tools","readme_excerpt":"Phase 1: Linux Command Line CTF Challenge Test your Linux command line skills with 18 progressive Capture The Flag challenges. All flags follow the format CTF{some text here} . [!IMPORTANT] Please complete Phase 1 Guide before attempting these challenges. Do not share solutions publicly - focus on sharing your learning journey instead. Challenges ⏱️ Expected time: 3-4 hours to complete all challenges # Challenge Description Difficulty Skills --- ----------- ------------- ------------ -------- 1 The Hidden File Find and read a hidden file in ctf challenges ⭐ Hidden files, ls 2 The Secret File Locate a file containing \"secret\" in its name under your home directory ⭐ File searching, find 3 The Largest Log Find and read an unusually large file in /var/log ⭐⭐ File sizes, log navigation 4 The User Detective Another user has a flag in their login configuration ⭐⭐ User management, UIDs 5 The Permissive File Find a suspicious file with wide-open permissions under /opt ⭐⭐ Permissions 6 The Hidden Service Something is listening on port 8080. Connect to it ⭐⭐ Networking, ports 7 The Encoded Secret Find and decode an encoded flag in ctf challenges ⭐⭐ Base64, encoding 8 SSH Key Authentication Configure SSH key authentication and find a hidden flag ⭐⭐ SSH configuration 9 DNS Inspection Inspect the system DNS configuration without changing live resolver files ⭐⭐ DNS, systemd-resolved 10 Remote Upload Transfer any file to ctf challenges to trigger the flag ⭐⭐ File transfer, SCP 11 Web Configu","default_branch":null,"files":null,"tree":[],"storefront":"/r/learntocloud","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/learntocloud/linux-ctfs/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}