[bobbyi_settv]

Your initial "find" version would be better if it used print0 because it would avoid failing on files with spaces in their names:

find ~/.ssh -name '*.pub' -print0 | xargs -0 ssh-keygen -lf

[motoboi]

This of course can be rewritten as find ~/.ssh -name \*.pub -exec ssh-keygen -lf {} \;