Any way to reboot a iDevice that is connected to a USB port via terminal (Mac terminal)?
idevicediagnostics is a Linux tool which can help here. It is also available for macOS according to these instructions.
Once installed you can use
idevicediagnostics restart
to restart your device.
To restart a specific device connected to a macbook that has more than one device connected to, use:
idevicediagnostics -u udidnumber restart
To install this third-party program, on the Terminal:
brew install libimobiledevice
Use:
idevicediagnostics restart