Last Updated: November 21, 2025
⏰ Interactive Tool
Build and understand cron schedules with our Cron Expression Helper
Script Basics
#!/bin/bash
# Variables
name="John"
count=5
# If statement
if [ $count -gt 3 ]; then
echo "Count is greater than 3"
fi
# For loop
for i in {1..5}; do
echo "Number: $i"
done
# Functions
function greet() {
echo "Hello $1"
}
greet "World"Common Patterns
$1, $2, $3
Script arguments
$@
All arguments
$?
Exit status of last command
$#
Number of arguments
$(command)
Command substitution
💡 Pro Tip:
Always quote variables: "$var" prevents word splitting!