Uploading bash scripts

I'm sure this is a simple thing to do but I can't find out how to do it anywhere!

I've got a virtual private server (linux) with WHM and cPanel on it. There are a few small sites on the server.

I'm currently learning about bash scripts and I've created my first script. I can't for the life of me work out how to upload it on to the server.

I'm using Putty to get shell access to the server and I have read what to do once the script is uploaded but nothing seems to explain where and how to upload the script.

Could someone help me out??

Thanks