Error Handling

Basic error handling with set -e and return codes

#!/bin/bash
# Exit on any error
set -e

# Function that might fail
risky_operation() {
    if [ $1 -eq 0 ]; then
        echo "Success"
    else
        echo "Error occurred" >&2
        return 1
    fi
}

# Call with error handling
if risky_operation 1; then
    echo "Operation succeeded"
else
    echo "Operation failed"
fi

Using trap for automatic cleanup on script exit

#!/bin/bash
# Cleanup function
cleanup() {
    echo "Cleaning up..."
    rm -f /tmp/temp_file
}

# Set trap for cleanup on exit
trap cleanup EXIT

# Create temp file
touch /tmp/temp_file
echo "Temp file created"

# Script will automatically cleanup on exit

Using set -x for debugging script execution

#!/bin/bash
# Enable debug mode
set -x

# Your script commands
echo "Debug mode enabled"
var="test"
echo "Variable: $var"

# Disable debug mode
set +x
echo "Debug mode disabled"