Who needs it
This article may be useful for a small business that has important third-party software, other than Plesk, installed on their server. If only Plesk is installed on your server, it would be better and faster to reinstall your Linux OS before uninstalling Plesk. This script can be used for DEB-based and RPM-based OSes on which Plesk is installed.
Full Plesk uninstallation
Download the script and run it with root privileges on your Linux server:
# sh ./plesk_remove.sh
The script will remove all Plesk packages after your confirmation and shouldn't remove services like FTP, HTTP, etc. But note that some system services may not work after Plesk uninstallation due to their close integration with Plesk. So, use this script on your own risk. Feel free to share your experience and opinion about the uninstall script at the Odin forum.
In the article Plesk for Windows Uninstallation, you can find information on the uninstall procedure for Plesk for Windows.