Hi, trying to install a masternode i'm stuck here :
monacouser@Monacoeci:~$ monoecid: error while loading shared libraries: libboost_system.so.1.54.0: cannot open shared object file: No such file or directory
Any help greatly appreciated

probably you have to compile libboost by your own and install it on your system. It depends on the Linux/Debian-version you are using.But don'n worry - there are good explanations in the web. 30' should do it ... ;-)