osTicket is a widely used and trusted open source support ticketing system. It's open-source and actively developed on GitHub with 22.3k stars at the time of writing. It's built on PHP and requires a MySQL database, which will be configured in this guide. An HTTPS certificate will also be set up as well for added security. - A Debian 10 instance on Vultr. - A [sudo user](https://docs.vultr.com/how-to-use-sudo-on-a-vultr-cloud-server#create-a-sudo-user-on-debian--ubuntu). - System is fully [up-to......