Installation and Upgrade on Linux

We recommend you to install the Panel on a clean operating system. Before installing or upgrading Parallels Plesk Panel for Linux, make sure that the following requirements are met:

• A static IPv4 address is preliminarily configured. If you wish to install the Customer & Business Manager component, you also should have a host name that resolves to this IP address.
• PHP 5 is required for the brand new Web Presence Builder component.
• The disk space allocated to the /tmp directory exceeds 3 GB.
• A user who runs the installer is able to execute files in the /tmp directory. This makes it possible to install the system packages required for the Panel. When the installation is completed, we recommend you to mount /tmp with the noexec option. For details on how to do it, see http://kb.parallels.com/en/1410.
• If you run Debian, CloudLinux, or Ubuntu, add updates and security repositories to your apt (package manager) configuration.
• Your hard drive must be properly partitioned. For instructions, see the article at http://kb.parallels.com/article_17_819_en.html on partitioning tips.

If you wish to install Panel with the Business Manager component, you should preliminarily check that the MySQL server configuration option sort_buffer_size is set to 2 Megabytes (sort_buffer_size=2M) or more. This option is set in the /etc/my.cnf file. After the configuration change, restart the mysqld service:

service mysqld restart

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