Bash/Linux

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Overview

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What This Skill Provides

• Command chaining operators: ;, &&, ||, | for sequential and conditional execution
• File operations: Essential commands for listing, searching, and manipulating files
• Process management: Finding, managing, and killing processes by PID or port
• Text processing: Using grep, sed, awk, cut, sort, uniq, and wc
• Environment variables: Setting, viewing, and managing environment configuration
• Network operations: curl, nc, and network information commands
• Script templates: Production-ready Bash script structure with error handling
• Common patterns: Command checking, default values, file reading, loops
• Error handling: set options and cleanup traps

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Use Cases

• Automating development workflows with shell scripts
• Managing processes and finding what’s using specific ports
• Text processing and data extraction from files
• Debugging network issues and making API requests
• Writing robust shell scripts with proper error handling
• Chaining commands for complex operations

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Related Skills

• PowerShell Windows - Windows equivalent
• Server Management - Server administration
• Deployment Procedures - Deployment automation
• Systematic Debugging - Debugging with shell tools

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Which Agents Use This Skill

• Backend developers working on Linux/macOS
• DevOps engineers writing deployment scripts
• System administrators managing servers
• Data engineers processing text files

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Key Principles

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Command Chaining

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Text-Based Pipeline

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Error Handling with Set Options

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

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Script Template

#!/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 "$@"

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Common Patterns

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Check if Command Exists

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

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Default Variable Value

NAME=${1:-"default_value"}

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Cleanup on Exit

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

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Differences from PowerShell

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Remember