Linux & Mac OSX: Remove blank lines from a file with awk

Here is nice awk one liner to remove blank lines from a file, just replace FILENAME with the file you want the blank lines removed from:

awk '/./' FILENAME

Here is a sed one liner to remove blank lines from a file, just replace FILENAME with the file you want the blank lines removed from:

sed -i -e 's/^$/g' FILENAME