Command line Editing

Bash has two command modes, one emacs-like and one vi-like.

Emacs mode

run 'set -o emacs' to enter this mode.  (It's the default.)
up/down arrow goes to previous/next history line
right/left arrows move right/left
ctrl-a moves to beginning of line
ctrl-e moves to end of line
ctrl-w deletes previous word
ctrl-d deletes char under the cursor