I recently upgraded a Linode Ubuntu VPS to the latest (server) LTS version. After the upgrade, it started shutting down every 15-20 minutes like clockwork. I lo

I recently upgraded a Linode Ubuntu VPS to the latest (server) LTS version. After the upgrade, it started shutting down every 15-20 minutes like clockwork. I looked everywhere. I thought perhaps it could be some errant kernel configuration that was incompatible with the new version of the distro. I must’ve overlooked the actual problem at least a dozen times before I finally got a hint from /var/log/syslog. A lack of display/network activity had been detected, so the system was going to sleep. After the upgrade, that must’ve been the new default. I still don’t understand how this made sense for a server edition. How does the new default handle situations like these?