Online Bash Shell Compiler

This free online Bash compiler runs your shell script with Bash 5.2 on our server, inside a safe sandbox. When the script runs read, type the value in the terminal and press Enter. You see everything the script prints, and any error message from Bash with its line number.

It is made for students who learn shell scripting for a Unix or Linux lab, for an operating systems course, or for DevOps work, and who do not have a Linux computer at hand.

1. Write your script in the editor. A #!/bin/bash line at the top is allowed but not needed.
2. If your script uses read, type the value in the terminal and press Enter. Print the question first with echo -n, because read -p does not show its question here.
3. Press Run. The output and any error messages appear below.

Open any of these from the Examples tab in the side bar.

#!/bin/bash

name="DevHives"
echo "Hello, World!"
echo "Welcome to $name"

#!/bin/bash

read a
read b
sum=$(( a + b ))
echo "$a + $b = $sum"

#!/bin/bash

fruits=("apple" "mango" "banana")

for fruit in "${fruits[@]}"; do
  echo "I like $fruit"
done

echo "Total: ${#fruits[@]} fruits"

#!/bin/bash

check_marks() {
  if [ "$1" -ge 40 ]; then
    echo "$1: pass"
  else
    echo "$1: fail"
  fi
}

for m in 72 35 90; do
  check_marks "$m"
done

Bash is the shell on most Linux systems. A shell is the program that reads the commands you type in a terminal. A shell script is a text file with those commands in it, so you can run them again with one command.

Bash has variables, if and case, for and while loops, functions and arrays. System administrators and DevOps engineers use Bash scripts to automate their work, for example to back up files or to deploy an app. Strictly speaking Bash is an interpreter, not a compiler: it reads the script line by line and runs it.

• main.sh: line 3: name: command not foundThere is a space around the = sign. Write name="Asha", not name = "Asha".
• syntax error near unexpected token `fi'An if line is missing then, or the condition is missing spaces. Write if [ "$a" -gt 5 ]; then with a space after [ and before ].
• integer expression expectedA number test such as -gt got text or an empty value. Check that the variable holds a number, and put quotes around it.
• syntax error: operand expectedA number is missing inside $(( )). This happens when you write $b and b is empty — for example when you pressed Enter without typing a number.

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