Shebang & Running in Bash

From the Bash Scripting cheat sheet · Getting Started · verified Jul 2026

Create, permit, and run a script.

bash

# Quick Reference
#!/usr/bin/env bash
echo "Hello, World!"

# make it runnable, then run
chmod +x script.sh
./script.sh

💡 #!/usr/bin/env bash finds bash on PATH - more portable than a hardcoded /bin/bash.

⚡ A script needs the executable bit (chmod +x) to run as ./script.sh.

📌 Run without +x via "bash script.sh" - the interpreter is explicit there.

🟢 # starts a comment to end of line; the shebang is only special on line 1.

basicsshebang

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