Shebang & Running in Bash
From the Bash Scripting cheat sheet · Getting Started · verified Jul 2026
Shebang & Running
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