I set up a lot of server, and everything worked fine.
But now i have this error when a instal the libraries.
E: Unable to locate package libdb5.3++-dev
E: Couldn't find any package by regex 'libdb5.3++-dev'
I tried apt-get update, not working. The other librarie works fine.
I've had this problem on 2 different serveur
Try this instead:
apt-get install build-essential libssl-dev libboost-all-dev libdb-dev -y
It worked for me on another VPS.