Is there a guide available to use tor to run multiple masternodes, linux specifically?
If you are looking to help expand the Tor network and DNET network by running a 'dual stack' masternode then yes - some information can already be found in this thread, with a main guide being worked on.
If you are seeking to essentially circumvent DNET masternode security by utilizing Tor .Exit node operators IP offerings as your own masternode IP's - then no, not really.
The Tor network has less than 1000 .Exit nodes currently - see: https://torstatus.blutmagie.de/ - of which the majority will not allow exit traffic on DNET's 'default' port - being why port 989 was selected for DNET addnode=.onion hidden_services. Furthermore, Tor Exit node IP addresses rotate by default every 10 mins, which is certainly not ideal for attempting to run masternode exits over Tor.
...
Tor 0.2.8.6 stable was actually released yesterday - https://blog.torproject.org/blog/tor-0286-released - I've seen permission errors related to upgrading existing hidden_services on some linux distributions. Basically similar to this; https://stackoverflow.com/questions/31620783/what-is-wrong-with-my-tor
Oh, #LinuxissoFun ! today.