I have two debian servers. First - old - 2.6.32-042stab120.11 and second - 3.16.0-4-amd64 (I setup it today). First has apache: Server version: Apache/2.2.22 (Debian) Server built: Feb 28 2017 15:59:21 Second has apache: Server version: Apache/2.4.10 (Debian) Server built: Feb 24 2017 18:40:28 The thing is: 1. Why both servers has that old apache version - the newest is 2.4.25? 2. Why first server with older apache version has younger server built? 3. And what is "server built"?