Want Vi / Vim on your Bash command line
Put set -o vi into your ~/.bash_profile (on Mac) or ~/.bashrc (on Linux). Now, if you press Esc when you're on the command line, you can go backward/forward word-wise pressing B resp. W or bring-up Vim's VISUAL mode pressing V . After pressing Esc you can press I to get back to the INSERT mode to modify your command.