Currently, I am using the following command to change dos2unix line endings, but this is for file-y file...
sed -i \'s/\\r//\' filename
Is ther
Just adding another reference ...
On Ubuntu 14.04 the man dos2unix page provides this example, specifically for recusive conversion:
man dos2unix
find . -name *.txt | xargs dos2unix
Quoting from the man page, this will
... convert all the .txt files in the directory tree under the current directory ...