While I haven't yet jumped into the deep end of virtual tabletop experiences myself, the likes of Fantasy Grounds Unity and Foundry VTT support Linux and look really good. Want to spice them up if you play already? Enter the Pixels dice.
"Pixels are the coolest dice you’ve ever seen! Full of LEDs, smarts and no larger than regular dice, they can be customized to light up when and how you desire. Incredibly strong, smooth and sharp, they work for several hours at a time, after which you can simply recharge them with the accompanying case."
These special dice communicate with your phone or tablet via Bluetooth for customization or other fancy features but since they're still just dice, it's not a requirement to actually use them. The signals used aren't proprietary either, so they're in talks with the likes of Foundry VTT, Roll20 and other popular virtual tabletops which sounds pretty awesome. Just because you're at a distance, doesn't mean you shouldn't be able to have fun rolling right? Take a look at their trailer:
It's a new crowdfunded effort from former AAA game developer Jean Simonet, with a base goal of $200,000 which has proven to be ridiculously popular as after only 6 minutes it was funded. In the space of 3 hours it hit 1 million USD. Clearly then it's a hit with fans of tabletops and dice rolling.
See the Pixels Dice Kickstarter here.