# #90DaysOfDevOps Challenge - Day 12 - Linux & Git Wrap Up

Welcome to Day 12 of the #90DaysOfDevOps challenge. I'm happy to share my cheat-sheet summarizing all the essential commands and concepts I've learned during our Linux and Git/GitHub hands-on sessions.

## **📄 Linux & Git Cheat-Sheet 🚀**

## **🐧 Linux Cheat-Sheet:**

### Navigation:

* `cd [directory]`: Change your current directory to the specified directory.
    
* `ls`: Display a list of files and directories in the current directory.
    
* `pwd`: Print the absolute path of the current working directory.
    
* `mkdir [directory]`: Create a new directory with the specified name.
    
* `rm [file]`: Delete the specified file.
    
* `rm -r [directory]`: Remove the specified directory and its contents recursively.
    

### File Operations:

* `touch [file]`: Create a new file with the specified name.
    
* `cat [file]`: Display the contents of the specified file.
    
* `cp [source] [destination]`: Copy the file from the source location to the destination location.
    
* `mv [source] [destination]`: Move or rename the file from the source location to the destination location.
    
* `chmod [permissions] [file]`: Change the permissions of the specified file.
    

### User Management:

* `sudo [command]`: Execute the specified command with superuser privileges.
    
* `useradd [username]`: Create a new user with the specified username.
    
* `passwd [username]`: Set a password for the specified user.
    
* `su [username]`: Switch to the specified user.
    
* `userdel [username]`: Delete the specified user.
    

### Process Management:

* `ps`: Display a snapshot of the current running processes.
    
* `top`: Monitor the real-time system resources and running processes.
    
* `kill [pid]`: Terminate a process with the specified process ID.
    

### Networking:

* `ping [host]`: Send ICMP Echo Request packets to the specified host to check network connectivity.
    
* `ifconfig`: Display information about the network interfaces on your system.
    
* `netstat`: Display network connections, routing tables, and network interface statistics.
    

## **🐙 Git-GitHub Cheat-Sheet:**

### Repository Management:

* `git init`: Initialize a new Git repository in the current directory.
    
* `git clone [repository]`: Clone the specified repository from GitHub to your local machine.
    
* `git add [file]`: Add the specified file to the staging area for the next commit.
    
* `git commit -m "[message]"`: Commit the staged changes with a descriptive message.
    
* `git push`: Push the committed changes to a remote repository.
    
* `git pull`: Fetch and merge the latest changes from a remote repository.
    

### Branching and Merging:

* `git branch`: List all the branches in the repository.
    
* `git branch [branch]`: Create a new branch with the specified name.
    
* `git checkout [branch]`: Switch to the specified branch.
    
* `git merge [branch]`: Merge the changes from the specified branch into the current branch.
    

### Collaboration:

* `git remote add [name] [url]`: Add a remote repository with the specified name and URL.
    
* `git fetch [remote]`: Fetch the latest changes from the specified remote repository.
    
* `git pull [remote] [branch]`: Pull the latest changes from the remote branch and merge them into the current branch.
    
* `git push [remote] [branch]`: Push the local commits to the remote branch.
    

Feel free to use this cheat-sheet as a quick reference during your DevOps journey. Let it serve as a reminder of the powerful commands and concepts we've learned.

As we wrap up the Linux and Git/GitHub section, it's time to gear up for Day 13, where we'll embark on a new journey into the world of Python. Get ready for new learnings, challenges, and discoveries. Stay tuned!