https://github.com/karl-horning/bash-notebook
A personal collection of Bash scripts and notes for learning, automation, and quick reference. Includes file utilities, folder flatteners, and a growing cheatsheet for common shell tasks.
https://github.com/karl-horning/bash-notebook
automation bash cheatsheet cli-tools command-line learning-resources linux macos scripting shell shell-scripts utilities
Last synced: 6 months ago
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A personal collection of Bash scripts and notes for learning, automation, and quick reference. Includes file utilities, folder flatteners, and a growing cheatsheet for common shell tasks.
- Host: GitHub
- URL: https://github.com/karl-horning/bash-notebook
- Owner: Karl-Horning
- License: mit
- Created: 2025-07-18T10:08:33.000Z (7 months ago)
- Default Branch: main
- Last Pushed: 2025-07-28T20:45:45.000Z (7 months ago)
- Last Synced: 2025-07-28T22:28:30.299Z (7 months ago)
- Topics: automation, bash, cheatsheet, cli-tools, command-line, learning-resources, linux, macos, scripting, shell, shell-scripts, utilities
- Language: Shell
- Homepage:
- Size: 10.7 KB
- Stars: 1
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Bash Notebook Cheatsheet
---
## 📖 Table of Contents
- [Bash Notebook Cheatsheet](#bash-notebook-cheatsheet)
- [📖 Table of Contents](#-table-of-contents)
- [🤓 Overview](#-overview)
- [📁 Basic Navigation](#-basic-navigation)
- [📄 File \& Directory Operations](#-file--directory-operations)
- [⚙️ Variables](#️-variables)
- [🧠 Conditionals](#-conditionals)
- [🔁 Loops](#-loops)
- [📦 Functions](#-functions)
- [🧪 Test Operators](#-test-operators)
- [🧹 Useful One-Liners](#-useful-one-liners)
- [🧪 Exit Codes](#-exit-codes)
- [🔗 Script Template](#-script-template)
- [📄 Licence](#-licence)
- [👤 Author](#-author)
---
## 🤓 Overview
A collection of handy Bash syntax, commands, and examples. For learning, quick reference, and scripting!
---
## 📁 Basic Navigation
```bash
pwd # Print working directory
ls # List files
ls -la # Long format with hidden files
cd foldername # Change directory
cd .. # Go up one directory
```
---
## 📄 File & Directory Operations
```bash
touch file.txt # Create an empty file
mkdir myfolder # Create a directory
rm file.txt # Delete a file
rm -r folder # Delete a directory and contents
cp file.txt backup.txt # Copy file
mv old.txt new.txt # Rename or move file
```
---
## ⚙️ Variables
```bash
name="Karl"
echo "Hello $name"
```
---
## 🧠 Conditionals
```bash
if [ "$name" == "Karl" ]; then
echo "Hi Karl"
else
echo "Who are you?"
fi
```
---
## 🔁 Loops
```bash
# For loop
for i in {1..5}; do
echo "Loop $i"
done
# While loop
count=1
while [ $count -le 5 ]; do
echo "Count is $count"
((count++))
done
```
---
## 📦 Functions
```bash
greet() {
echo "Hello, $1!"
}
greet "Karl"
```
---
## 🧪 Test Operators
```bash
[ -f file.txt ] # File exists
[ -d mydir ] # Directory exists
[ -z "$var" ] # String is empty
[ "$a" -eq "$b" ] # Numbers equal
```
---
## 🧹 Useful One-Liners
```bash
grep "word" file.txt # Search for "word"
cat file.txt | less # Page through a file
find . -name "*.sh" # Find all .sh files
chmod +x script.sh # Make script executable
head -n 10 file.txt # First 10 lines
tail -f logs.txt # Follow file live
```
---
## 🧪 Exit Codes
```bash
echo $? # Shows the exit code of the last command
```
---
## 🔗 Script Template
```bash
#!/bin/bash
# Script to greet the user
name="$1"
echo "Hello, $name!"
```
Make it executable:
```bash
chmod +x myscript.sh
./myscript.sh Karl
```
---
## 📄 Licence
MIT © 2025 Karl Horning
---
## 👤 Author
Made with ❤️ by [Karl Horning](https://github.com/Karl-Horning)