Linuxupskillchallenge

<div align="center" width="100%"> <h1>Linux Upskill Challenge</h1> <h3>An Introduction to Linux Server Administration</h3> <a href="https://linuxupskillchallenge.org/"><img alt="Website" src="https://img.shields.io/website?url=https%3A%2F%2Flinuxupskillchallenge.org&style=for-the-badge&label=LinuxUpskillChallenge.org"></a> <a href="https://programming.dev/c/linuxupskillchallenge"><img alt="Lemmy subscribers" src="https://img.shields.io/lemmy/linuxupskillchallenge%40programming.dev?style=for-the-badge&logo=lemmy&logoColor=white&label=lemmy"></a> <a href="https://www.reddit.com/r/linuxupskillchallenge/"><img alt="Subreddit subscribers" src="https://img.shields.io/reddit/subreddit-subscribers/linuxupskillchallenge?style=for-the-badge&logo=reddit&logoColor=white&label=reddit"></a> <a href="https://discord.gg/linux-upskill-challenge-682046666928685068"><img alt="Discord" src="https://img.shields.io/discord/682046666928685068?label=discord&logo=discord&logoColor=white&style=for-the-badge" /></a></br> <img alt="GitHub last commit (branch)" src="https://img.shields.io/github/last-commit/livialima/linuxupskillchallenge/master?style=for-the-badge&logo=github&logoColor=white"> <img alt="GitHub Repo stars" src="https://img.shields.io/github/stars/livialima/linuxupskillchallenge?style=for-the-badge"> <img alt="GitHub watchers" src="https://img.shields.io/github/watchers/livialima/linuxupskillchallenge?style=for-the-badge"> <img alt="GitHub forks" src="https://img.shields.io/github/forks/livialima/linuxupskillchallenge?style=for-the-badge"> <a href="https://github.com/sponsors/livialima"><img alt="GitHub Sponsors" src="https://img.shields.io/github/sponsors/livialima?style=for-the-badge&logo=githubsponsors"></a> </div>

Linux Upskill Challenge is free and open source — and it always will be. If it helped you and you’d like to support its maintenance, you can do that here: Donate or Sponsor.

All core learning materials are accessible year-round. No subscriptions, no registration required - so costs you nothing but your time!

If you spot any typos or "dead links" simply raise an issue.

• Website of the course
• Full lesson source
• Complementary video playlists
• Monthly lessons on Lemmy
• Monthly lessons on Reddit
• Chat with Discord

READ THIS FIRST!

HOW THIS WORKS & FAQ

Table of Contents

• Day 0 - Creating Your Own Server: how to setup your lab in AWS, Azure, Google Cloud, Digital Ocean and on a local server
• Day 1 - Get to know your server: Starting with ssh-ing in and some simple commands like: ls, uptime, free, df -h, uname -a. Extensions on doing passwordless login with public keys and and an ssh config file.
• Day 2 - Basic navigation: Basic navigation, the "man" pages, file hierarchy
• Day 3 - Power trip!: Working with sudo, uptime, timezones, changing your hostname
• Day 4 - Installing software, exploring the file structure: Using 'apt' to find and install software. Use of mc to explore the filesystem. Looking at the contents of: /etc/passwd, /etc/ssh/sshd_config and /var/log/auth.log
• Day 5 - More or less...: Using more, less and navigating in these. Dotfiles, history, tab completion, and using the nano txt editor
• Day 6 - Editing with "vim": Learning vim, the minimal knowledge, but also via vimtutor
• Day 7 - The server and its services: Installing Apache2, stopping and starting, altering the content, reading logs
• Day 8 - The infamous "grep" and other text processors: Hands-on with text tools like grep, cat, more, less, cut, awk and tail - and piping of course. (and a wave to awk and sed)
• Day 9 - Diving into networking: Looking at open ports with ss, and a nod to netstat, install nmap and test. Install ufw, set up, enable and test etc. Discuss security resonsibilities as the sysadmin.
• Day 10 - Scheduling tasks: Covering cron, at, and systemd timers
• Day 11 - Finding things...: Finding things with: locate, find, grep, which
• Day 12 - Transferring files: SFTP, the technology, clients, and copying up and down
• Day 13 - Users and Groups: Using adduser, visudo to setup up a restricted "helper" to manage our host
• Day 14 - Who has permission?: Permissions, users, groups, (ACLS and SELinux in the Extension)
• Day 15 - Deeper into repositories...: Repositories in more detail, how to enable "Multiverse", the role of PPAs in Ubuntu, enabling and installing from them
• Day 16 - Archiving and compressing: Understanding and using tar and gzip
• Day 17 - Build from the source: Installing from source. Discussion, using wget to get a tarball, tar to extract and then configure, make and install. Discussion of security, maintenance issues.
• Day 18 - Logs, monitoring and troubleshooting: Log management and rotation, logrotate
• Day 19 - Inodes, symlinks and other shortcuts: Inodes, hard links symlinks and stat
• Day 20 - Scripting: Understanding how scripting work in Linux, the shebang, permissions and $PATH. A couple of simple sample scripts based on the filtering of logs we've been doing. Resources to explore further.
• Day 21 - What's next?: Closing the course with some suggestions.

Thank you for being part of this community and happy Linuxing!