bash-linux

name	bash-linux
description	Bash/Linux terminal patterns. Critical commands, piping, error handling, scripting. Use when working on macOS or Linux systems.
type	skill
created	2026-02-27T00:00:00.000Z
domain	software-development
category	devtools
risk	unknown
source	community
tags	["skill","software-development","devtools","bash","linux"]

Bash Linux Patterns

Essential patterns for Bash on Linux/macOS.

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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"

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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

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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