Bash Linux

A solid reference card for bash fundamentals that covers the stuff you actually use: command chaining with operators, file operations, process management, and text processing with grep/sed/awk. The script template with set -euo pipefail is good boilerplate, and the comparison table against PowerShell helps if you switch between systems. Nothing groundbreaking here, just a well-organized cheat sheet that saves you from googling "how to kill process on port" for the hundredth time. The error handling section with trap for cleanup is a nice touch that beginners often miss.

skills.sh installs: 116
GitHub stars: 7.6K
last updated: Jun 3, 2026

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Install

$ npx -y skills add vudovn/antigravity-kit --skill bash-linux --agent claude-code

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Files

Bash Linux Patterns

Essential patterns for Bash on Linux/macOS.

1. Operator Syntax

Chaining Commands

Operator	Meaning	Example
`;`	Run sequentially	`cmd1; cmd2`
`&&`	Run if previous succeeded	`npm install && npm run dev`
`\|\|`	Run if previous failed	`npm test \|\| echo "Tests failed"`
`\|`	Pipe output	`ls \| grep ".js"`

2. File Operations

Essential Commands

Task	Command
List all	`ls -la`
Find files	`find . -name "*.js" -type f`
File content	`cat file.txt`
First N lines	`head -n 20 file.txt`
Last N lines	`tail -n 20 file.txt`
Follow log	`tail -f log.txt`
Search in files	`grep -r "pattern" --include="*.js"`
File size	`du -sh *`
Disk usage	`df -h`

3. Process Management

Task	Command
List processes	`ps aux`
Find by name	`ps aux \| grep node`
Kill by PID	`kill -9 <PID>`
Find port user	`lsof -i :3000`
Kill port	`kill -9 $(lsof -t -i :3000)`
Background	`npm run dev &`
Jobs	`jobs -l`
Bring to front	`fg %1`