🚀Day 15: Git, GitHub, and Linux Cheat Sheet for Beginners

✅Linux Cheatsheet:

ls: List files and directories
cd: Change directory
pwd: Print working directory
mkdir: Make directory
touch: Create empty file
cp: Copy files or directories
mv: Move or rename files or directories
rm: Remove files or directories
cat: Display file content
nano or vi: Text editors for editing files

File Permissions:

chmod: Change file permissions
chown: Change file ownership
chgrp: Change group ownership

System Information:

uname -a: Display Linux system information
hostname: Show system hostname
top or htop: Display system resources and running processes
free: Show memory usage
df -h: Display disk space usage

Package Management:

apt-get (Debian/Ubuntu) or yum (Red Hat/CentOS): Package management commands for installing, updating, and removing software packages
apt-cache search or yum search: Search for available packages
apt-get update or yum update: Update package lists
apt-get install or yum install: Install packages
apt-get remove or yum remove: Remove packages
apt-get upgrade or yum upgrade: Upgrade installed packages

Process Management:

ps: Display information about active processes
kill: Terminate processes
kill all: Terminate processes by name
pgrep: Find processes by name
pkill: Send signals to processes by name

Networking:

ifconfig or ip addr: Display network interface information
ping: Check network connectivity
netstat: Display network statistics
ssh: Secure Shell for remote access
scp: Securely copy files between hosts
wget or curl: Download files from the internet

System Logs:

tail: Display the last part of a file (e.g., log files)
grep: Search for patterns in files or output
journalctl: Query and display system journal logs
dmesg: Display kernel ring buffer messages

Cron Jobs:

crontab -e: Edit cron jobs for scheduling tasks
crontab -l: List cron jobs
crontab -r: Remove cron jobs

Compression and Archiving:

tar: Archive files
gzip, bzip2, zip: Compress and decompress files

This cheat sheet covers some essential commands for navigating the filesystem, managing processes, networking, package management, and more. Remember to use man command followed by the command name to get more information about any command.

✅Git and GitHub Cheat sheet:

Git Basics:

git init: Initialize a new Git repository locally
git clone <repository-url>: Clone a repository from a remote URL
git add <file>: Add file changes to the staging area
git commit -m "Commit message": Commit staged changes to the repository
git status: Check the status of the working directory and staging area
git diff: Show changes between commits, commit and working tree, etc.
git log: Display commit history
git branch: List, create, or delete branches
git checkout <branch-name>: Switch branches or restore working tree files
git merge <branch-name>: Merge changes from one branch into another
git pull: Fetch from and integrate with another repository or a local branch
git push: Update remote repository with local commits
git remote -v: List remote repositories and their URLs
git fetch: Download objects and refs from another repository
git reset: Reset current HEAD to the specified state
git revert: Revert some existing commits
git stash: Stash changes in the working directory

GitHub:

git remote add origin <repository-url>: Add a remote repository URL named 'origin'
git push -u origin <branch-name>: Push the local branch to the remote repository
Pull Requests (PRs): Create, review, and merge code changes via GitHub's Pull Request feature
Issues: Create, assign, and manage issues to track bugs, tasks, and enhancements
Branch Protection: Configure rules to enforce quality checks and prevent force-pushes on specific branches
Webhooks: Set up event-driven automation by configuring webhooks to trigger actions in response to repository events
GitHub Actions: Automate workflows, build, test, and deploy code using GitHub Actions

Conclusion 🎉

Understanding and mastering Linux commands alongside Git and GitHub is essential for any DevOps engineer. This cheat sheet aims to provide a comprehensive yet easy-to-follow guide to help you navigate the basics efficiently. Whether it's managing files, permissions, processes, or repositories, these commands form the backbone of daily operations in a DevOps environment.

Happy Learning! 🚀