Bash Linux

A solid reference card for bash essentials that covers what you actually need when working in the terminal. You get operator chaining, file operations, process management, and text processing tools in quick-reference tables. The script template with error handling flags (set -euo pipefail) is genuinely useful, and the PowerShell comparison table helps if you're coming from Windows. It's not trying to teach bash from scratch, just giving you the commands and patterns you'll reach for when debugging a process, grepping logs, or writing a deployment script. Keep it open when you need syntax you use monthly but can never quite remember.

skills.sh installs: 405
GitHub stars: 33.2K
last updated: Aug 21, 2026

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Install

$ npx -y skills add davila7/claude-code-templates --skill bash-linux --agent claude-code

Installs into .claude/skills of the current project.

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`