“Automating common development tasks such as building, testing, and deploying your application has many benefits, including increasing repeatability and consistency by removing the potential for interference by ‘the human element.’ Deploying your applications by running a single command from the comm…”— David E Worth, digitalocean.com
“MySQL replication is the process by which a single data set, stored in a MySQL database, will be live-copied to a second server. This configuration, called "master-slave" replication, is a typical setup. Our setup will be better than that, because master-master replication allows data to be copied f…”— Digital Ocean Community, digitalocean.com
“MySQL cluster works best in a shared-nothing environment. Ideally, no two components should share the same hardware. For simplicity, and demonstration purposes, we'll limit ourselves to using only three Droplets. There will be two Droplets acting as data nodes which are syncing data between themselv…”— Anatoliy Dimitrov, digitalocean.com
“A service called fail2ban can mitigate this problem (edit: SSH being public) by creating rules that can automatically alter your iptables firewall configuration based on a predefined number of unsuccessful login attempts. This will allow your server to respond to illegitimate access attempts without…”— Justin Ellingwood, digitalocean.com