Did I make a bad decision staying for 4 years as a tech support agent??
I want to move on to higher position ( system ad or network admin) and somehow I wondered why did I stay too long on my job. I have an exam next week on another company and now Im cramming.

Things my current job didn't thought me like MS SQL, IP routing, Linux, shell scripting etc.. I'm not getting any younger , 28 y/o .