This comes from readline, and there are many many useful shortcuts. For example "M-." (i.e. "Escape", then ".") to insert the last argument of the previous com

This comes from readline, and there are many many useful shortcuts. For example "M-." (i.e. "Escape", then ".") to insert the last argument of the previous command. This is great when you run something like: ls /path/to/foo cd M-.