is there a DOpus for linux
no. i do wish there were however.
There are some others such as. Krusader for Linux, but can not compete with Dopus. I think some here in the forum run Dopus in Linux through Wine but I do not know how well it works. I have only tried to install it in Linux / Wine but have not tested it for a long time.
For me, it's a big reason I run Windows and do not switch to Linux. Would easily buy the license again if it came to Linux as well, but Dopus is so integrated with Windows so they will probably have to restart everything from scratch.