compiling on linux --------> follow instructions on website
http://fair-coin.infotested on several versions of linux

It seems that the dbx.h file got renamed so you first have to make sure you have all the pre-reqs, as stated here
https://github.com/visbtc/fair-coin/blob/master/doc/readme-qt.rstthen,
go into the src directory do "cp dbx.h db.h", then "cd ..", and do "qmake "USE_UPNP=-" ", then make to create the file.
I just did it on my server works perfectly, if you still have issues post them here but be clear on the error you are getting.