How to rename with prefix/suffix?

Question

How do I do mv original.filename new.original.filename without retyping the original filename?

I would imagine being able to do something like mv

Answer 1

In Bash and zsh you can do this with Brace Expansion. This simply expands a list of items in braces. For example:

# echo {vanilla,chocolate,strawberry}-ice-cream
vanilla-ice-cream chocolate-ice-cream strawberry-ice-cream

So you can do your rename as follows:

mv {,new.}original.filename

as this expands to:

mv original.filename new.original.filename