Plesk (ex: Parallels Plesk Control Panel, Plesk Server Administrator, PSA, or just Plesk) software package is a commercial web hosting automation program.
Parallels Plesk Panel allows a server administrator to set up new websites, reseller accounts, e-mail accounts, and DNS entries through a web-based interface. The administrator can create client and site templates, which predetermine resource-allocation parameters for the domains and/or clients. Parallels Plesk Panel for Linux/UNIX supports multiple POSIX platforms, including Debian, Red Hat Linux, SUSE and Ubuntu. Parallels Plesk Panel for Windows supports Windows Server 2003, Windows Server 2008 and Windows Server 2012 operating systems. Parallels Plesk Panel installs custom versions of or manages versions of MySQL and PostgreSQL databases (Microsoft SQL Server and Microsoft SQL Server Desktop Engine under Windows), Nginx, Apache Tomcat Java platform server, ColdFusion server, as well as CounterStrike and Battlefield 1942 game servers.