I found this article this evening before go to sleep. I agree the most of its points, It gives us a very basical way on how to verify good system administors.
”The best admin is the person with the right mindset, not the person with the most time on the job.“ That shoud be the fundermatal difference between high-level sysadmins and system checkers.
I also tried to create an article on this topic, and now it’s simply and clearly documented by Nate Campi.
Personally the ways on system security maintenance and the automation side of administration should be mentioned as well, as normally they are ignored, Also a high-level system admin should have good developing experience, as some modification work on open-souced application is needed sometimes, especially when the productive environment is quite specific. Click here to read the full article at campin.net.