I wanted to answer http://unix.stackexchange.com/questions/3043/use-roff-to-underline-words with "just use ul, this command is meant specifically for underlining text", however I just can't grasp how to use it. I thought
$ echo "hello _kitty_ world" > /tmp/foo.txt $ ul /tmp/foo.txt
would give me an underlined "kitty", however it doesn't. What am I doing wrong?