Q:

For example, suppose I want to ls all files that are not js. Probably I would do:

ls ! *.js

But I get errors for my ! operator.

How can I execute mv, rm, and any other operations with the not (!) operator?

A:

In the bash shell, you should enable extglob and run ls !(*.js).

Example:

 $ touch file.js file.txt
 $ shopt -s extglob
 $ ls  !(*.js)
 file.txt

You need to add it to your ~/.bashrc if you want to set it permanently.