I'm semi-new and not an idiot with computers. I can't get update-manager-d to run and it says that their is no such thing. Can anyone help me?
You're looking for
update-manager -d (note the space).
update-manager is the name of the program,
d is an option flag.
You indicate options with a dash (
update-manager -d) when they are a single letter (which most are), and you indicate them with a double dash (
update-manager --devel-release) when they are a word. Often, both forms are available for common options for a program. Run
man <program-name> for more details on the program's available options.