I am speaking of very basic knowledge and basic relationships to each other.   I am not saying that people need to know php, pdo, mysql, and server structure to a great extent but at least have some very basic knowledge of how they relate to each other.   So many people in my own business support have been running a site for years and they still have no idea what an htaccess file is or what it does or what php ini is or does.  Or they have no idea what permissions is or what they are for or how to deny an ip.  

To me it is the same as owning a brick and mortar business and not knowing how to count money or read or run the register or do a sale or where the fire alarm and fire extinguisher is or how to lock the back door.   Free hosting sites and free web-builders do play a roll in this of course but that is a whole new book lol... 

Understanding that the next war will probably be a cyber war and people are having people trust them with their personal information and many times they have no idea how to protect that information on a basic level. 

None of us knows everything i do not for sure, but i did research and learn the basics before i ever asked my first member to trust me with their info.  I am just saying have some very basic knowledge.

I am sorry if you think that was mean of me to say, i did not intend to relay that feeling and i did not feel that myself when i wrote it.  

I am personally not experienced with plesk, i have always used cPanel and am sold on cPanel but i would think there has to be some good turorials out there for plesk.   So you need plesk tutorial on cron i will help you find one of you want?