To explain better; There's a shell script example.sh that upon execution creates a menu:

0. do this
1. do that

I want to create a batch script that calls example.sh then selects one of the options.

I tried the below it just opens the script.

./example.sh; 0
./example.sh; echo 0
  • Do you mean you want to call anoter script with parameters or build another script dynamically & lanch it if build is OK ? – francois P Jan 8 '20 at 17:17
  • 1
    This will depend on how the script works. Can you share the script here? Even better, can you just share a small part of the script that is enough to reproduce the issue? – terdon Jan 8 '20 at 17:18

Maybe you can dive into "expect" (or some modern derivatives) that are meant to programmatically interact with text based programs.


You probably want:

echo 0 | ./example.sh

This will send the string 0\n to the script's standard input.

Your attempts are misguided: with ./example.sh; exit 0 the shell will

  • first run the script,
  • then, after it ends, will run the echo 0 command
  • Aw! thank you. If i want to run multiple choices one after another, I assume I could: echo 1 | ./example.sh; echo 0 | ./example.sh – Maven BeJayjay Jan 8 '20 at 17:40
  • No, you would do printf "%s\n" choice1 choice2 choice3 etc | ./example.sh -- you only want to run the script once, giving it ALL the input. – glenn jackman Jan 8 '20 at 21:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.