What do sysadmin classes mean?

Question

System administration

In some rare vacancies I meet "a system administrator of the 2nd class / 2nd category is required."
Who to share information about these categories?

Answer 1

1.3. A
person with a higher professional (mathematical, engineering-mathematical, technical) education and work experience in the specialty in the field of information technology in positions filled by specialists with higher professional education for at least 3 years is appointed to the position of a network administrator (system administrator);
- a network administrator (system administrator) of the II qualification category is appointed a person who has a higher professional (mathematical, engineering-mathematical, technical) education and work experience as a network administrator (system administrator) for at least 2 years;
- a network administrator (system administrator) of the I qualification category is appointed a person who has a higher professional (mathematical, engineering and mathematical, technical) education and work experience as a network administrator (system administrator) of the II qualification category for at least 2 years.

Answer 2

It's like a plumber and a locksmith of the 1st or 6th category))), it's easier to ask employers a question about the vacancy

Answer 3

I think they are talking about this - habrahabr.ru/post/193280
Let me not poke around in this opus.