Agent skill

bash-linux

Bash/Linux terminal patterns. Critical commands, piping, error handling, scripting. Use when working on macOS or Linux systems.

View SKILL.md on GitHub Repository
Stars 232
Forks 15

Install this agent skill to your Project

npx add-skill https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/bash-linux

SKILL.md

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

4. Text Processing

Core Tools

Tool Purpose Example
grep Search grep -rn "TODO" src/
sed Replace sed -i 's/old/new/g' file.txt
awk Extract columns awk '{print $1}' file.txt
cut Cut fields cut -d',' -f1 data.csv
sort Sort lines sort -u file.txt
uniq Unique lines sort file.txt | uniq -c
wc Count wc -l file.txt

5. Environment Variables

Task Command
View all env or printenv
View one echo $PATH
Set temporary export VAR="value"
Set in script VAR="value" command
Add to PATH export PATH="$PATH:/new/path"

6. Network

Task Command
Download curl -O https://example.com/file
API request curl -X GET https://api.example.com
POST JSON curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' URL
Check port nc -zv localhost 3000
Network info ifconfig or ip addr

7. Script Template

bash
#!/bin/bash
set -euo pipefail  # Exit on error, undefined var, pipe fail

# Colors (optional)
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m'

# Script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Functions
log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
log_error() { echo -e "${RED}[ERROR]${NC} $1" >&2; }

# Main
main() {
    log_info "Starting..."
    # Your logic here
    log_info "Done!"
}

main "$@"

8. Common Patterns

Check if command exists

bash
if command -v node &> /dev/null; then
    echo "Node is installed"
fi

Default variable value

bash
NAME=${1:-"default_value"}

Read file line by line

bash
while IFS= read -r line; do
    echo "$line"
done < file.txt

Loop over files

bash
for file in *.js; do
    echo "Processing $file"
done

9. Differences from PowerShell

Task PowerShell Bash
List files Get-ChildItem ls -la
Find files Get-ChildItem -Recurse find . -type f
Environment $env:VAR $VAR
String concat "$a$b" "$a$b" (same)
Null check if ($x) if [ -n "$x" ]
Pipeline Object-based Text-based

10. Error Handling

Set options

bash
set -e          # Exit on error
set -u          # Exit on undefined variable
set -o pipefail # Exit on pipe failure
set -x          # Debug: print commands

Trap for cleanup

bash
cleanup() {
    echo "Cleaning up..."
    rm -f /tmp/tempfile
}
trap cleanup EXIT

Remember: Bash is text-based. Use && for success chains, set -e for safety, and quote your variables!

Recommended Agent Skills

Expand your agent's capabilities with these related and highly-rated skills.

aiskillstore/marketplace

perigon-backend

Perigon ASP.NET Core + EF Core + Aspire conventions

232 15
Explore
aiskillstore/marketplace

perigon-agent

Pointers for Copilot/agents to apply Perigon conventions

232 15
Explore
aiskillstore/marketplace

perigon-angular

Angular 21+ standalone/Material/signal conventions for Perigon WebApp

232 15
Explore
aiskillstore/marketplace

fastapi-mastery

Comprehensive FastAPI development skill covering REST API creation, routing, request/response handling, validation, authentication, database integration, middleware, and deployment. Use when working with FastAPI projects, building APIs, implementing CRUD operations, setting up authentication/authorization, integrating databases (SQL/NoSQL), adding middleware, handling WebSockets, or deploying FastAPI applications. Triggered by requests involving .py files with FastAPI code, API endpoint creation, Pydantic models, or FastAPI-specific features.

232 15
Explore
aiskillstore/marketplace

context7-efficient

Token-efficient library documentation fetcher using Context7 MCP with 86.8% token savings through intelligent shell pipeline filtering. Fetches code examples, API references, and best practices for JavaScript, Python, Go, Rust, and other libraries. Use when users ask about library documentation, need code examples, want API usage patterns, are learning a new framework, need syntax reference, or troubleshooting with library-specific information. Triggers include questions like "Show me React hooks", "How do I use Prisma", "What's the Next.js routing syntax", or any request for library/framework documentation.

232 15
Explore
aiskillstore/marketplace

browser-use

Browser automation using Playwright MCP. Navigate websites, fill forms, click elements, take screenshots, and extract data. Use when tasks require web browsing, form submission, web scraping, UI testing, or any browser interaction.

232 15
Explore

Didn't find tool you were looking for?

Be as detailed as possible for better results