The Vesta Control Panel is an open source hosting control panel. WARNING: Questions involving web hosting control panels are generally off-topic at ServerFault and more appropriately asked on https://webmasters.stackexchange.com/
Use this tag for questions relating to the vesta control panel. This quest might include, apache, Nginx, MySQL, letsencrypt, etc...
Official website: http://vestacp.com/
Off Topic Warning:
The majority of questions regarding the Vesta control panel are likely to be more appropriate for the Pro Webmasters Stack Exchange and will be closed here as they are not considered on-topic for ServerFault:
Questions involving web hosting control panels are off-topic at Server Fault because they customize their systems such that normal administration tools and methods no longer apply, and thus require support from the vendor or the web hosting industry. See Where can I ask questions about web hosting control panels?