Bash Commands Cheat Sheet ✨

Basic Commands

Displaying Output:

Echo a calculation result:

  num1=4
  num2=5
  echo $((num1+num2))   # Prints: 9
  echo 'end'            # Prints: end

🔗 Tip: echo is great for printing text or results in the terminal!

Get the Current Directory:

Print working directory:
```
  pwd
```
🔐 Displays the current location in the filesystem.

Check Current User:

Who am I?
```
  whoami
```
👤 Shows the username of the logged-in user.

Listing Directory Contents 🔍

See All Files and Folders:

Basic listing:
```
  ls
```
Show hidden files and folders:
```
  ls -a
```
Show permissions of contents:
```
  ls -la
```
⚡ Pro Tip: Permissions include read (r), write (w), and execute (x).

File and Folder Operations 📁

Create Files:

Using touch command:

  touch script.js script1.js script2.js script3.js

Create Folders:

Using mkdir command:
```
  mkdir src
```

Copy Files:

Copy a file into a folder:
```
  cp fileNameToCopy folderNameToPaste
```

Move Files:

Move a file to another folder:
```
  mv fileNameToCopy folderNameToPaste
```

Rename Files:

Move and rename a file:

  mv fileNameToMoveOrRename newFileName

Delete Files and Folders:

Delete a file:
```
  rm fileName
```
Delete an empty folder:
```
  rmdir folderAddress
```
Delete a folder with contents:
```
  rm -r folderAddress  # -r means recursive
```
⚡ Pro Tip: Use with caution as this permanently deletes files!

For Loops in Bash 🔄

Create Multiple Files:

100 JavaScript files:

  for i in {1..100}; do touch "app$i.js"; done

Delete Multiple Files:

Remove those 100 files:

  for i in {1..100}; do rm "app$i.js"; done

Viewing and Editing Files 🔧

View File Data:

Using cat command:
```
  cat fileName
```
✨ Note: cat means concatenate and is used to display file content.

Edit File Data:

Using nano editor:
```
  nano fileName
```
Using vim editor:
```
  vim fileName
```
⚡ Pro Tip: To save in vim, press ESC then type :wq to write and quit.

Summary

This cheat sheet gives you a quick and interactive guide to essential bash commands. From managing files 📂 to looping 🔄 and editing content 🔧, bash scripting makes automating tasks fun and efficient!

Happy Coding 🚀