Linksys EA8500 (https://openwrt.org/toh/linksys/ea8500) has newer locked firmware requiring TTL flash. The product guide links to this guide (https://mrjcd.com/EA8500_DD-WRT/) that describes using a specific device on windows with device drivers specifically for windows.
I am using ubuntu and dont have any way to use windows with device drivers (this would require bare metal install and i dont have the ability to do that right now), is this possible and what USB to TTL should i buy that works on ubuntu?