To replace text in vim with line number

e.g.:

mv file_abc.jpg pic.XX.jpg
mv random.jpg   pic.XX.jpg
mv other.jpg    pic.XX.jpg
mv name.jpg     pic.XX.jpg

If you do this:

:%s/XX/\=line(".")/

Make SSH ignore SSH key

Make SSH ignore your SSH key, not prompt for a passphrase, only use password:

$ ssh -o PreferredAuthentications=keyboard-interactive -o PubkeyAuthentication=no destination.host