update main description

- signed-off-by: trimstray <trimstray@gmail.com>

Author: trimstray

README.md

@@ -37,7 +37,7 @@
 
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-:information_source: &nbsp;This project contains **284** test questions and answers that can be used as a test your knowledge or during an interview/exam for position such as **\*nix System Administrator**.
+:information_source: &nbsp;This project contains **284** test questions and answers that can be used as a test your knowledge or during an interview/exam for position such as **Linux (\*nix) System Administrator**.
 
 :heavy_check_mark: &nbsp;The answers are only **examples** and do not exhaust the whole topic. Most of them contains **useful resources** for a deeper understanding.