Fundamentos de Shell Scripting

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

# Variables
NAME="webapp"
ENV=${1:-"dev"}  # Default to 'dev' if not provided

# Conditional
if [[ "$ENV" == "prod" ]]; then
    echo "Deploying to production..."
    REPLICAS=3
else
    echo "Deploying to $ENV..."
    REPLICAS=1
fi

# Loop
for i in {1..5}; do
    echo "Attempt $i"
done

echo "Deployed $NAME with $REPLICAS replicas"

#!/bin/bash
set -euo pipefail  # Strict mode

# Function definition
log() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1"
}

# Check command exists
check_dependency() {
    if ! command -v "$1" &> /dev/null; then
        log "ERROR: $1 is required but not installed"
        exit 1
    fi
}

# Usage
check_dependency docker
check_dependency kubectl
log "All dependencies satisfied"