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====== Bash: Bad interpreter: no such files or directory ======

===== Scenario =====

When you try to run a bash script you receive this error
**-bash: ./controller.sh: /bin/bash^M: bad interpreter: No such file or directory**

In my case this happens systematically if I transfer bash files with FTP (e.g. Filezilla) from one Linux computer to another Linux computer because FTP standard for text file transforms CR into CR+LF

According to the FTP specification, ASCII files are always transferred using a CR+LF pair as line ending. 

Another source of problem is editing bash files into Windows OS (you will be damned forever if you do it!)


===== Solution =====

When possibile, lock FTP on using binary mode for everything.\\

On Windows use an editor that allow to force *nix line ending with CR (e.g. notepad ++ or Eclipse)


**For bash files already "corrupted" use:**\\

//dos2unix <file.sh>//