Calculator. Modeling. Extrapolate. Predict. Forecast. Investigate. Survey. Statistical analyses. Find out how the skills you put on your resume affect how employers perceive your application and view a list of. Managing user accounts is the primary responsibility of a Linux SA system administrator. This is also one of the responsibilities generally assigned to junior level SAs. Junior level SAs take on this task because it is time consuming and considered a lower level activity. This designation is not meant to be insulting to anyone, but,