One-click installation is a fast and hassle-free way of getting a Plesk server with default configuration up and running. Here is how to do it:
First, make sure that your server conforms to the installation requirements: Software Requirements for Plesk Onyx.
Then, log in to the server via SSH as the ‘root’ user and run the following command:
# sh <(curl https://autoinstall.plesk.com/one-click-installer || wget -O - https://autoinstall.plesk.com/one-click-installer)
The installation will proceed automatically, taking, on average, between thirty minutes and an hour. The installer will download the latest stable Plesk release, install it with the default set of components and features designed to suit the needs of the majority of users, and apply all available patches and updates for maximum security and performance.
Do not worry that you are missing out on any Plesk features this way - you can add or remove Plesk components later. However, if you would like to have control over what components are installed, take a look at installing via console or the web GUI.
After the installation is completed, you will need to perform the post-install configuration - see the Post-Install Configuration topic for details.