This is the DOS<->Unix line-ending conversion script I'm using since decades now.
Nowadays DOS means actually Windows. I just recently was plagued not only by the CRLF issue, but also by the fact, that in the Unicode world of Windows more and more plain text files actually also have a BOM header (Byte Order Marker). Not all tools on Unix understand that. So I tweaked the scripts to remove also BOM headers when converting from Windows to Unix.
To install the scripts on Unix, just clone the repository and call
sudo install.sh
This will by default install the tools in /usr/local/bin and the manpage in /usr/local/man/man1