A new (paid) DLC for Euro Truck Simulator 2 has been released today for Linux on Steam: Heavy Cargo.
This DLC adds eight new heavy haul cargos and two trailers with steerable axles to the game.

Beyond that, a free update for the main game has been released with these new features:

- New Truck Chassis Variants and Tuning
- Truck Analysis Screen

The complete announcement and description can be read on Steam.