8.22. How do I reformat DOS text files to UNIX ones?

Simply use this perl command:

perl -i.bak -npe 's/\r\n/\n/g' file ...

file is the file(s) to process. The modification is done in-place, with the original file stored with a .bak extension.

Alternatively you can use the tr(1) command:

tr -d '\r' < dos-text-file > unix-file

dos-text-file is the file containing DOS text while unix-file will contain the converted output. This can be quite a bit faster than using perl.