Setting Apple Software Update (SUS) to get updates from Apple

Use the following command to force your Mac to use Apple for software updates:

sudo defaults delete /Library/Preferences/com.apple.SoftwareUpdate CatalogURL

Here is the article from Apple Support:

https://support.apple.com/en-us/HT202030 

Remotely Disconnect A Session From the Command Line: Windows Server

1. Go to the Command prompt
2. Type "qwinsta" for a list of logged in users
3. Locate the "ID" for the account you want to disconnect
4. Type "rwinsta [ID number]"
5. Run "qwinsta" again to ensure that the user was disconnected