Hi, we are currently running a CentOS Web Server which hosts our Database Web Application (nginx and mysql). It has backups all over the place, but we are keen to create a duplicate machine that we could just swicth to should anything happen to it. I've looked at rsync to just keep a current copy of the enrtire system backuped up to the second server, but I'm not sure if that will cover everything, or even if we need to shut down server one to make the initial backup to server two. Does anyone know of the best, most efficient way of accomplishing this please? Any advice would be greatly appreciated. Thanks.