There are essentially three types of VPS hosting in terms of management and support: unmanaged, semi-managed and fully managed VPS hosting. In an unmanaged VPS environment, the entire server administration and the responsibilities of necessary configuration and management of the virtual server are responsibility of the end user. Users need to have some knowledge in administration of Linux servers. The security of an unmanaged virtual server is entirely the user’s responsibility as well. Users have to keep the server’s services and website scripts up to date by upgrading whenever a new version is released to keep the server secure and avoid vulnerabilities.