Linux Master server

Hi.

I have made a master server on linux before but now Unity have updated it(I think). I am having trouble setting up a Master server on linux, the first error I am getting is this below, this is relatively easy to fix:

The second error I am having is to do with MasterServer.cpp and I cannot fix it:

So any tutorials I have followed so far all say to do what I am doing but they never get these errors. Is there any suggestions on what to do, thanks.