This article may be useful for a small business that has important third-party software, other than Parallels Plesk Panel, installed on their server. If only Parallels Plesk Panel is installed on your server, it would be better and faster to reinstall your Linux OS before uninstalling Parallels Plesk Panel.
Full Parallels Plesk Panel uninstallation
Download this script at plesk_remove.zip (2Kb) 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