osTicket is a free and open-source customer support system released under the GPL-2.0 license. This tutorial explains how to install osTicket on CentOS 7 and set up HTTPS with a free Let's Encrypt TLS certificate. * A [CentOS 7 server](https://www.vultr.com/servers/centos) with SELinux disabled. * Follow Vultr's best practices guides to [create a sudo user](https://docs.vultr.com/how-to-use-sudo-on-a-vultr-cloud-server#create-a-sudo-user-on-almalinux-centos-fedora-rocky-linux-and-vzlinux) and [u......