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Bash script – "/bin/bash^M: bad interpreter: No such file or directory"

I'm using this tutorial to learn bash scripts to automate a few tasks for me.
I'm connecting to a server using putty.

The script, located in .../Documents/LOG, is:

#!/bin/bash
# My first script
echo "Hello World!"

And I executed the following for read/write/execute permissions

chmod 755 my_script

Then, when I enter ./my_script, I'm getting the error given in the title.

Some similar questions wanted to see these, so I think they might help :

$ which bash
/bin/bash

and

$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/bin/mh

I tried adding the current directory to PATH, but that doesn't work …

Solution

  • I have seen this issue when creating scripts in Windows env and then porting over to run on a Unix environment.

    Try running dos2unix on the script:

    http://dos2unix.sourceforge.net/

    Or just rewrite the script in your Unix env using vi and test.

    Unix uses different line endings so can't read the file you created on Windows. Hence it is seeing ^M as an illegal character.

    If you want to write a file on Windows and then port over, make sure your editor is set to create files in UNIX format.

    In notepad++ in the bottom right of the screen, it tells you the document format. By default, it will say Dos\Windows. To change it go to