# Day 12 - DevOps Mastery Cheatsheet  (Dec 8, 2023)

## Linux Commands

### Navigation

* `cd [directory]`: Change directory. Move to the specified directory.
    
* `ls`: List files and directories. Display the contents of the current directory.
    
* `pwd`: Print working directory. Show the current working directory's full path.
    

### File Operations

* `touch [filename]`: Create a new file. Generates an empty file with the specified name.
    
* `cp [source] [destination]`: Copy file or directory. Duplicate a file or directory to a specified location.
    
* `mv [source] [destination]`: Move or rename file or directory. Move a file or directory to a new location or rename it.
    
* `rm [file]`: Remove/delete file. Delete a file permanently.
    

### Text Manipulation

* `cat [file]`: Display content of a file. Output the content of a file to the terminal.
    
* `grep [pattern] [file]`: Search for a pattern in a file. Find and display lines matching a specified pattern in a file.
    
* `echo [text] > [file]`: Create or overwrite content in a file. Write text to a file, overwriting existing content.
    
* `nano [file]`: Open a text editor. Launch the Nano text editor to create or edit files.
    

### File Permissions

* `chmod [permissions] [file]`: Change file permissions. Modify the access permissions of a file.
    
* `chown [owner]:[group] [file]`: Change file owner and group. Assign a new owner and group to a file.
    

### Process Management

* `ps`: Display running processes. Show a snapshot of the currently running processes.
    
* `kill [PID]`: Terminate a process. End a running process using its Process ID.
    

## Git-GitHub Commands

### Repository Basics

* `git init`: Initialize a new Git repository. Start a new Git project in the current directory.
    
* `git clone [repository]`: Clone a repository. Copy a remote repository to the local machine.
    
* `git status`: Show the status of changes. Display the current state of the working directory.
    

### Making Changes

* `git add [file]`: Add changes to the staging area. Stage modifications for the next commit.
    
* `git commit -m "[message]"`: Commit changes with a message. Record changes to the repository with a descriptive message.
    

### Branching

* `git branch`: List branches. Display a list of all branches in the repository.
    
* `git checkout [branch]`: Switch to a branch. Change to the specified branch.
    
* `git merge [branch]`: Merge changes from a branch. Combine changes from the specified branch into the current branch.
    

### Remote Collaboration

* `git remote add origin [remote repository]`: Add a remote repository. Set a remote repository for the project.
    
* `git push -u origin [branch]`: Push changes to a remote repository. Upload local branch changes to the remote repository.
    
* `git pull origin [branch]`: Pull changes from a remote repository. Retrieve changes from the remote repository and merge them into the local branch.