[Fix] bash: script.sh: /bin/bash^M: bad interpreter: No such file or directory

If you are trying to execute a bash .sh script on Linux or Unix environment like Ubuntu or macOS and you get the error "/bin/bash^M: bad interpreter: No such file or directory" the reason is that you have Ctrl+M characters in your file, most likely its because you wrote the file on a Windows text editor having Windows EOL encoding format (\r).

Fix/Solution:

There are multiple ways in which this issue can be fixed, let's take a look at a few of them.

Solution 1: Using sed command:

sed command is a stream editor for filtering and transforming text, so you can read all \r (ctrlM) characters and remove them.

# sed -ie 's/\r$//' your-script-filename.sh

or,

sed -ie 's/^M$//' your-script-filename.sh

Solution 2: Using Text Editor like Notepad++/Sublime Text/Edit Plus:

You can make use of Text Editors like Notepad++ to change the End Of Line Encoding (EOL),

Notepad++

Open the file in Notepad++,
Go to Menu: Edit,
Now Look for option, EOL Conversion,
And choose UNIX/OSX Format

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