Git Basics:

• git init: Initialize a new Git repository.

• git clone <repository-url>: Clone a repository into a new directory.

• git status: Check the status of your working directory and staging area.

• git add <file>: Add a file to the staging area.

• git commit -m "commit message": Commit changes in the staging area with a descriptive message.

• git push origin <branch>: Push changes to a remote repository.

• git pull origin <branch>: Pull changes from a remote repository.

• git checkout <branch>: Switch to a different branch.

• git merge <branch>: Merge changes from a different branch into the current branch.

• git branch: List all branches in the repository.

• git log: View commit history.

• git diff <file>: Show changes between commits, commit and working tree, etc.

Branching and Merging:

• git branch <branch-name>: Create a new branch.

• git checkout -b <branch-name>: Create and switch to a new branch.

• git merge <branch-name>: Merge a branch into the current branch.

• git branch -d <branch-name>: Delete a branch.

Undoing Changes:

• git reset HEAD <file>: Unstage changes from the staging area.

• git checkout -- <file>: Discard changes in the working directory.

• git revert <commit>: Revert a specific commit.

Remote Repositories:

• git remote add <name> <url>: Add a new remote repository.

• git remote -v: List all remote repositories.

• git fetch <remote>: Fetch changes from a remote repository.

• git remote show <remote>: Show information about a remote repository.

• git push <remote> --delete <branch>: Delete a branch on a remote repository.

• git pull --rebase origin master: Pull changes from the remote repository and rebase local commits on top.

Git Configuration:

• git config --global user.name "Your Name": Set your username globally.

• git config --global user.email "youremail@example.com": Set your email globally.

• git config --list: List all Git configurations.

This cheat sheet covers the basic Git commands and concepts.

Linux Important Commands:

File System Navigation:

• pwd: Print the current working directory.

• ls: List files and directories.

  • ls -l: Detailed list view.

  • ls -a: List including hidden files.

• cd <directory>: Change directory.

• cd ..: Move up one directory.

• cd ~: Move to the home directory.

File Operations:

• touch <filename>: Create an empty file.

• mkdir <directory>: Create a new directory.

• cp <source> <destination>: Copy files or directories.

• mv <source> <destination>: Move or rename files or directories.

• rm <file>: Remove files (use with caution).

  • rm -r <directory>: Remove directories recursively.

• cat <file>: Display the contents of a file.

• less <file>: View file contents page by page.

• head <file>: Display the beginning of a file.

• tail <file>: Display the end of a file.

File Permissions:

• chmod <permissions> <file>: Change file permissions.

• chown <user>:<group> <file>: Change file ownership.

• chgrp <group> <file>: Change file group ownership.

• umask: Set default permissions for new files.

Process Management:

• ps: List processes.

  • ps aux: Detailed process list.

• top: Display real-time system resource usage.

• kill <PID>: Terminate a process by process ID.

• killall <process_name>: Terminate a process by name.

• pkill <pattern>: Send signal to processes based on name.

• pgrep <pattern>: List processes based on name.

System Information:

• uname -a: Display kernel information.

• lsb_release -a: Display Linux distribution information.

• df -h: Show disk space usage.

• du -h <directory>: Show directory space usage.

• free -h: Display memory usage.

• uptime: Show system uptime and load averages.

Package Management (Debian/Ubuntu):

• apt update: Update package lists.

• apt upgrade: Upgrade all installed packages.

• apt install <package>: Install a package.

• apt remove <package>: Remove a package.

• apt search <keyword>: Search for a package.

Text Processing:

• grep <pattern> <file>: Search for a pattern in a file.

• sed 's/find/replace/' <file>: Stream editor for filtering and transforming text.

• awk '{print $<column>}' <file>: Pattern scanning and processing language.

• sort <file>: Sort lines of text files.

• uniq <file>: Report or omit repeated lines.

Miscellaneous:

• date: Display current date and time.

• cal: Display a calendar.

• history: Display command history.

• tar: Archive files.

• zip: Compress files.

• unzip: Extract files from a zip archive.

• man <command>: Display manual page for a command.

Happy Learning 🚀