For both Trucking-Simulations Euro Truck Simulator 2 and American Truck Simulator the Update 1.34 has been released for Linux on Steam. The Changelog to Euro Truck Simulator 2 :

Changelog MAN TGX Euro 6 Timezone areas fixed - Kaliningrad area, RU (Beyond the Baltic Sea map expansion required) Many little map fixes and world polish added

The Changelog to American Truck Simulator:

Changelog Buyable Log trailer Tonopah city refreshed Another segment of OR-140 (Oregon map expansion required) Timezone areas fixed - Malheur county, OR (Oregon map expansion required) Numerous little map fixes and world polish added