https://github.com/sundanc/bashcheatsheet
CheatSheet for bash commands you need!
https://github.com/sundanc/bashcheatsheet
bash bash-commands bash-script cheatsheet linux
Last synced: 4 months ago
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CheatSheet for bash commands you need!
- Host: GitHub
- URL: https://github.com/sundanc/bashcheatsheet
- Owner: sundanc
- License: mit
- Created: 2025-02-17T22:12:14.000Z (4 months ago)
- Default Branch: main
- Last Pushed: 2025-02-18T08:23:16.000Z (4 months ago)
- Last Synced: 2025-02-18T09:28:35.536Z (4 months ago)
- Topics: bash, bash-commands, bash-script, cheatsheet, linux
- Homepage:
- Size: 4.88 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Bash Commands Cheatsheet
> Essential bash commands. If this repo helped you in any way, consider giving it a star ⭐
## Table of Contents
- [Basic Command Structure](#basic-command-structure)
- [File Navigation & Management](#file-navigation--management)
- [File Viewing & Editing](#file-viewing--editing)
- [System Information](#system-information)
- [File Permissions](#file-permissions)
- [Process Management](#process-management)
- [Environment & Variables](#environment--variables)
- [Network](#network)
- [Package Management](#package-management-ubuntudebian)
- [Repository Commands](#repository-commands)
- [Useful Combinations](#useful-combinations)
- [Script-Related](#script-related)
- [Common Use Cases](#common-use-cases)
- [Safety Notes](#safety-notes)
## Basic Command Structure
```bash
command [options] [arguments] # General syntax
command --help # Get help for any command
man command # Show manual page
info command # Detailed documentation
```
## File Navigation & Management
```bash
pwd # print working directory
ls -la # list all files with details
cd /path/to/dir # change directory
mkdir -p dir1/dir2 # create nested directories
rm -rf dir # remove directory recursively (use with caution!)
cp -r src/ dest/ # copy directories recursively
mv old_name new_name # move/rename files
touch file.txt # create empty file
find . -name "*.py" # find files by pattern
tree # display directory structure
```
## File Viewing & Editing
```bash
cat file.txt # display file content
less file.txt # view file with pagination
head -n 5 file.txt # show first 5 lines
tail -f file.log # follow log file updates
grep "pattern" file # search text in file
nano file.txt # simple text editor
vim file.txt # advanced text editor
diff file1 file2 # compare files
```
## System Information
```bash
top # process viewer
htop # enhanced process viewer
df -h # disk space usage
free -h # memory usage
ps aux | grep python # find python processes
which python3 # locate command
uname -a # system information
lsb_release -a # distribution info
uptime # system uptime
lscpu # CPU information
```
## File Permissions
```bash
chmod +x script.sh # make script executable
chmod 755 file # set permissions (rwxr-xr-x)
chown user:group file # change file owner
chmod -R 644 dir # recursively change files
chmod -R 755 dir # recursively change directories
stat file # display file status
```
## Process Management
```bash
ps aux # list all processes
kill -9 PID # force kill process
bg # send process to background
fg # bring process to foreground
nohup command & # run command after terminal closes
jobs # list background jobs
pgrep process_name # find process ID
pkill process_name # kill process by name
```
## Environment & Variables
```bash
export PATH=$PATH:/dir # add to PATH
echo $HOME # print environment variable
source ~/.bashrc # reload bash configuration
env # show all environment vars
printenv # print environment
set # show all shell variables
```
## Network
```bash
ping google.com # test connectivity
curl http://site.com # http request
wget http://site.com # download file
sudo netstat -tulpn # show active ports
ssh user@hostname # ssh connection
ifconfig # network interface config
ip addr # modern interface config
dig domain.com # DNS lookup
traceroute domain.com # trace packet route
```
## Package Management (Ubuntu/Debian)
```bash
sudo apt update # update package list
sudo apt upgrade # upgrade installed packages
sudo apt install pkg # install package
sudo apt remove pkg # remove package
sudo apt autoremove # clean unused packages
apt search pkg # search for package
apt show pkg # show package details
```
## Repository Commands
```bash
git init # initialize repository
git clone url # clone repository
git status # check status
git add . # stage all changes
git commit -m "msg" # commit with message
git push origin main # push to remote
git pull # update local repository
```
## Useful Combinations
```bash
command1 | command2 # pipe output
command > file.txt # redirect output to file
command >> file.txt # append output to file
command1 && command2 # run if previous succeeds
command1 || command2 # run if previous fails
time command # measure execution time
```
## Script-Related
```bash
#!/bin/bash # shebang line
set -e # exit on error
set -x # debug mode
$1, $2 # script arguments
$? # last command exit status
$# # number of arguments
$$ # process ID of the script
$@ # all arguments
$0 # script name
```
## Common Use Cases
```bash
# Find and replace in files
find . -type f -name "*.txt" -exec sed -i 's/old/new/g' {} +
# Monitor system resources
watch -n 1 'free -h; echo; df -h'
# Search command history
history | grep "command"
# Compress/Extract
tar -czf archive.tar.gz dir/ # compress
tar -xzf archive.tar.gz # extract
# Find large files
find / -type f -size +100M -exec ls -lh {} \;
```
## Safety Notes
- Always double-check before using `rm -rf`
- Use `rm -i` for interactive deletion
- Back up important files before using `chmod -R` or `chown -R`
- Test scripts in isolated environment first
- Use `sudo` with caution
- Create backup before system changes: `cp file{,.bak}`
- Use `--dry-run` when available to test commands
## License
MIT License - Feel free to share and modify with attribution.
## Contributing
1. Fork the repository
2. Create your feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request
Please ensure your PR:
- Follows consistent formatting
- Includes clear descriptions
- Tests all commands
- Updates Table of Contents if needed
Feel free to submit issues and enhancement requests!