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Summary
This article will explain how to turn on remote login (SSH) on macOS computers from Terminal and add a user to the remote login group.
This also works remotely using Apple Remote Desktop, as long as Remote Management is enabled on the remote computer.
Environment
Directions
Modify SSH Service
	- Enable the service: sudo systemsetup -setremotelogin on
- See the current remote login status: sudo systemsetup -getremotelogin
- Disable remote login: sudo systemsetup -setremotelogin off
Add User to Remote Login Group
	- sudo dseditgroup -o edit -a USERENAME -t user com.apple.access_ssh
- You can also add the user via System Settings > General > Sharing > Remote Login