$ cd /director/with/your/file
$ find . -type f -exec perl -pi -e 's/\r\n?/\n/g' {} \;
$ perl -pi -e 's/\r\n?/\n/g' filename.txt
This is my blogchalk: United States, Oklahoma, Tulsa, Midtown, English, Austin Gilbert, Male, 26-30, computer science, photography.