osTicket is a widely-used and trusted open source support ticket system. It seamlessly routes inquiries created via email, web-forms and phone calls into a simple, easy-to-use, multi-user, web-based customer support platform. The best part is, it’s completely free. This Guide will quickly guide you on how to install Open Source support ticketing system OsTicket On Linux.
Using cPanel this installation is merely a two click process. So if you have a cPanel hosting option that is one easy way to quickly do it.
See https://linuxroutes.com/complete-guide-install-open-source-support-ticketing-system-osticket-linux/ 
Complete Guide: How to install Open Source support ticketing system OsTicket On Linux – UX Techno
This Guide will quickly guide you on how to install Open Source support ticketing system OsTicket On Linux.