Linode

 Linode  is a company that provides virtual private servers and DNS hosting.

Security auto-updates
Linode will update servers as needed when it receives notice of security updates, and if necessary reboot servers (sometimes with very little notice, like a day or days).


 * 2015-12-13 Linode Critical Xen Maintenance

Such reboots may affect long running processes, and any applications you were running that require a manual restart will require you to do so.