Introduction

Welcome to your ultimate cheat-sheet for Linux and Git-GitHub! This guide is designed to be a quick reference for essential commands, providing brief explanations and usage examples to enhance your productivity and efficiency. Whether you're a beginner or an experienced developer, this cheat-sheet will serve as a valuable resource for both everyday tasks and advanced operations. Let's dive into the world of Linux and Git-GitHub!

Linux Commands

Basic Commands

ls
- Usage: Lists the files and directories in the current directory.
- Example:
```
  ls
  ls -la  # Includes hidden files and detailed information
```

cd

Usage: Changes the current directory.

Example:

  cd /path/to/directory
  cd ..  # Moves up one directory

pwd
- Usage: Prints the working directory.
- Example:
```
  pwd
```
mkdir
- Usage: Creates a new directory.
- Example:
```
  mkdir new_directory
```

rm

Usage: Removes files or directories.

Example:

  rm file.txt
  rm -r directory  # Recursively removes a directory

cp

Usage: Copies files or directories.

Example:

  cp source.txt destination.txt
  cp -r source_directory destination_directory

mv

Usage: Moves or renames files or directories.

Example:

  mv old_name.txt new_name.txt
  mv /path/to/file /new/path/

touch
- Usage: Creates an empty file or updates the timestamp of an existing file.
- Example:
```
  touch newfile.txt
```

File Permissions

chmod

Usage: Changes the permissions of a file or directory.

Example:

  chmod 755 script.sh  # Sets read, write, execute for owner and read, execute for group and others

chown
- Usage: Changes the owner of a file or directory.
- Example:
```
  chown user:group file.txt
```

Networking

ifconfig / ip
- Usage: Displays or configures network interfaces.
- Example:
```
  ifconfig
  ip addr show
```
ping
- Usage: Checks connectivity to a host.
- Example:
```
  ping example.com
```

System Monitoring

top
- Usage: Displays active processes and system resource usage.
- Example:
```
  top
```
df
- Usage: Reports file system disk space usage.
- Example:
```
  df -h
```
du
- Usage: Estimates file space usage.
- Example:
```
  du -sh *
```

Package Management

apt-get (Debian/Ubuntu)

Usage: Installs, updates, and removes packages.

Example:

  sudo apt-get update
  sudo apt-get install package_name
  sudo apt-get remove package_name

yum (CentOS/RHEL)

Usage: Installs, updates, and removes packages.

Example:

  sudo yum update
  sudo yum install package_name
  sudo yum remove package_name

Git-GitHub Commands

Git Basics

git init
- Usage: Initializes a new Git repository.
- Example:
```
  git init
```
git clone
- Usage: Clones a repository into a new directory.
- Example:
```
  git clone https://github.com/user/repository.git
```
git add
- Usage: Adds files to the staging area.
- Example:
```
  git add file.txt
  git add .
```
git commit
- Usage: Records changes to the repository.
- Example:
```
  git commit -m "Commit message"
```
git status
- Usage: Displays the state of the working directory and the staging area.
- Example:
```
  git status
```
git log
- Usage: Shows the commit history.
- Example:
```
  git log
```

Branching and Merging

git branch

Usage: Lists, creates, or deletes branches.

Example:

  git branch  # Lists branches
  git branch new-branch  # Creates a new branch
  git branch -d old-branch  # Deletes a branch

git checkout

Usage: Switches branches or restores files.

Example:

  git checkout branch-name
  git checkout -b new-branch  # Creates and switches to a new branch

git merge
- Usage: Merges changes from one branch into another.
- Example:
```
  git checkout main
  git merge feature-branch
```

Remote Repositories

git remote

Usage: Manages remote repository connections.

Example:

  git remote add origin https://github.com/user/repository.git
  git remote -v  # Lists remote connections

git push
- Usage: Uploads local repository content to a remote repository.
- Example:
```
  git push origin main
```
git pull
- Usage: Fetches and integrates changes from a remote repository.
- Example:
```
  git pull origin main
```
git fetch
- Usage: Downloads objects and refs from another repository.
- Example:
```
  git fetch origin
```

Conclusion

This cheat-sheet covers essential commands for Linux and Git-GitHub, providing a handy reference for daily use and advanced operations. By mastering these commands, you'll enhance your productivity and become more proficient in managing your development environment. Remember, practice is key to becoming comfortable with these tools, so don't hesitate to experiment and explore further.

Happy coding and contributing to the DevOps community! 😎🙌

Thank you for reading our DevOps blog post. We hope you found it informative and helpful. If you have any questions or feedback, please don't hesitate to contact us.

I hope this helps!

Happy Learning✨

Day 12 - Mastering Linux and Git-GitHub: Your Ultimate Cheat-Sheet

Table of contents

Introduction

Linux Commands

Basic Commands

File Permissions

Networking

System Monitoring

Package Management

Git-GitHub Commands

Git Basics

Branching and Merging

Remote Repositories

Conclusion

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Rahul Gupta

Rahul Gupta