Job Descriptions for a system administrator position provide you with a lot of information. Do not wait until your next job search to review a system administrator job description, because doing so early and frequently helps you to keep your job skills relevant and up to date.
You can also use job descriptions in general to look for trends in the industry and then adjust your skill set through education as a result. Getting into information technology as a system administrator is a great career option and knowing what potential hiring companies are looking for, can provide you with guidance to plan your career as system administrator.