[ruok0101]

One little known, but very handy tip:

At any password prompt, if you knowingly mis-keyed your password, rather than pressing return, getting the "your an idiot" message (often after an annoying 1 - 2 second delay), and having to retype the command, you can actually press ctrl-U, which is the "Clear the line" bash command, and start over typing your password again.

[rockybutler]

For those of us using emacs-style bash keybinds. For vi-style keybinds, it's something more like "esc dd".

PS if you are a Vim user, you owe it to yourself to try the vim-style keybinds. They make a world of difference.