The reboot postponement feature after an install is not available on linux - but there is no caution in the UI that this will cause an immediate reboot for end users - I'm rolling this out and have not managed to upset a couple of my team with surprise reboots (thankfully not during anything critical - just internal meetings) as I'd set if running thinking they could pick a convenient time.
While having to coordinate with each user is an unwelcome overhead that would be good to resolve, a UI level fix cautionating of this would avoid a bad install impression for end-users.