Preface  Meeting Installation Requirements  Installing Parallels Plesk Panel on Linux and FreeBSD  Upgrading Parallels Plesk Panel on Linux and FreeBSD  Switching Between Mail Servers  Installing Parallels Plesk Panel on Numerous Servers  Installing License Keys     Upgrading the Trial License Key Through the Parallels Plesk Panel Interface     Installing License Keys Through the Parallels Plesk Panel Interface     Installing License Keys Through the Command Line  Configuring Access to Vendor Updates for Your Server's Operating System  Removing Parallels Plesk Panel from Linux Systems  Removing Parallels Plesk Panel from FreeBSD Systems  Appendix A. Parallels Products Installer's Command Line Options