Linux

Linux is an operating system's kernel. It is mainly used in servers because Linux is fast, secure, and free.

Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.

Vesta control panel (VestaCP) is an open source hosting control panel, which can be used to manage multiple websites, create and manage email accounts, FTP accounts, and MySQL databases, manage DNS records and more.