How can I replace multiple empty lines with a single empty line in bash?

Question

I have a file that contains:

something



something else

something else again

I need a bash command, sed/grep w.e that will produce the fo

Answer 1

Actually, if you replace multiple newlines with a single newline, the output would be:

something
something else
something else again

You can achieve this by:

sed /^$/d FILE