Shell script file (.sh) does not run, and throws an error

bash: ./test.sh: bin/bash: bad interpreter: No such file or directory

Replace:

#!bin/bash

With:

#!/bin/bash

bin/bash is a path relative to the current directory. /bin/bash is an absolute path that works whatever the current directory is.

Also, have a look at your PATH:

echo $PATH

If you place test.sh in any directory listed there and you will will be able to execute it without the ./ or other path specifier. Many people create a $HOME/bin directory, place all their scripts there, and add it to their PATH.

To be able to run your bash script, change first line to

#!/bin/bash

That is the binary that will interpret and run your script.

To run a bash script, do the following

./scriptname.sh

In your example:

./test.sh

in the directory where you have the script.

I edited the .sh file on a Windows machine and saw similar issue. The issue was fixed after running dos2unix on the script.