For example, I have formed a long complicated command that will improve the world and lower an entropy in the Universe. But then (huh!) I see that I forgot to make a dir required. I want to store my command, run mkdir and then restore my command.
Assume doing it in a raw tty.
Is there a way to do so?
On your command-line press Ctrl-u (it stores it in the kill-ring), issue the other one mkdir for example, and then press Ctrl-y.
Use set -o vi command or set -o emacs (typically one would store this in .bashrc for convenience). This enables a vi-style (or emacs type) line editing interface.
This provides you with a command line vi editor. You can search for previous commands, edit commands, etc.
Examples:
Use ESC key to enter vi command mode, then
$ /search-string Use UP and DOWN keys, (or j and k) to list found commands
$ long-command-you-want-to-edit Hit ESC key type vi Then edit the long command in a vi editor.
