macos - Rename files and extensions in one command in Mac OS X

Is there a way to rename multiple files in one command. In Windows, I am aware of the command

ren *.* *.jpg

Is there a similar command in Mac OS X that i could run, instead of hitting enter on each and every individual file and doing the renaming.

Answer

With unix-like systems, it's easier to use find

find ./  

(try this first to make sure that your list of files looks like what you were expecting

find ./ -exec mv ${} ${}.jpg \; 

This will append .jpg to the end of every file found. The regex for changing the final extension, rather than just appending, is left as an exercise for the reader.