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Why does my shell script not work in a docker container?

I have written a very simple shell script ("test.sh") and put it into a container. I can see it using "> ls" in the Docker terminal. and its contents using "> more" However, when I type "> ./test.sh" I get

/bin/sh: ./test.sh: not found

Here is the output for ls -l (I am operating as "user")

-rwxrwxrwx    1 user     group          327 Mar 24 14:14 test.sh

What am I doing wrong?

Additional information. Here is a minimal example:

#!/bin/sh
var=$1
echo $var

The solution is to add "sh" in front of the command

sh test.sh testMessage

gives back

testMessage

Additional note: Thanks to @David Maze.

I changed

#!/bin/bash

to

#!/bin/sh
Solution

  • The solution is to add "sh" in front of the command

    sh test.sh testMessage

    gives back

    testMessage