A Quick and simple video on how to create a 10.13.6 USB memory stick installer on you Mac.
This link may help you with the terminal command:
How to edit a user on a Mac
A Quick video on how to edit a user on a Mac once it has been created.
How to reduce the size of a PDF using preview on a Mac
Here is a quick video on how to use preview on a mac in reducing a PDF to a size that would be manageable for any email client. Also show the option of using a downloadable filter to use in preview for different PDF size conversions.
https://discussions.apple.com/thread/4975061?tstart=0
How to share a screen on a Mac
In this video we show how easy it is to share your Mac screen so you can remote into it from another Mac on the same network using screen share.