What professional skills should a freelance Linux sysadmin have?

Question

linux

We are not talking about psychology or something else in the style of "stress resistance", "perseverance", etc.
This is specifically about the professional skills that are (more often) needed to make money freelancing.
And yes, let's limit ourselves to Linux :)
upd: The
question is, what skills of raising/configuring/administrating what(their) software/packages/distribution kits should a Linux-sysadmin-freelancer have and which ones are used more often?

Answer 1

1) Purely professional skills.
Which ones - an interesting question, in principle, you can earn with any.
It would be nice to have the skills that your potential clients will need.
But here the question is - who will actually be your potential customers? Will you administer servers for highload, configure routing and shaping in small offices, will you configure the servers of some tricky startup in a tricky way?
That is, you need to either find out your skills and look for clients for them, or find clients with whom you would like to work, find out what skills they need, and upgrade them.
2) Ability to sell.
Freelancing is an independent work, you need to look for customers yourself, convince them that you are the best performer, minimize risks, and set an adequate price.
This is where a bunch of good professionals who come to freelance stumble and wonder why some cunning guys, who can’t even be called professionals, take a bunch of orders and have a lot of money, and they are cool professionals who are forced to survive on small and insignificant orders.

Answer 2

did psychologists and managers completely endure the brain for you? instead of answering, you need to know such and such software and such and such distributions, you have spread all sorts of demagogy.

Answer 3

"stress resistance", "perseverance", etc.

these are all trifles, the main thing is adequacy ─ finding an adequate admin or designer is an order of magnitude more difficult than a developer, layout designer, or manager

Answer 4

You need to be able to find answers to most questions on your own. This topic, even on the toaster, has been sucked up and down repeatedly. The most basic skill, the admin often encounters something for the first time in many projects, and the inability to simply read the documentation or google distinguishes the admin from the admin.

Answer 5

the ability to recompile the kernel and return the entire system from null