>What certifications? Share recommendations please
CISCO has a certification for network stuff
Red Hat has one for linux stuff
>At what exactly?
Get good at CentOS or RHEL (red hat), both are industry grade linux distros for servers
>You mean configuring network on linux?
I mean network stuff in general, take a course on networking, learn subnets, learn how TCP and UDP works, learn IPv4 and IPv6. Because a large part of server management is setting up networks. Get comfortable with VPN, no not the ones you buy, rather making your own VPN using OpenVPN and buying some cloud instances, do some experiments like these (+ add them in resume)
Learn SaaS, PaaS and all that crap, learn AWS and GCP (Firebase and stuff). Learn anything related to clouds and VPS basically.
Also dont take my word for it, I am a zoomer faggot anyways. I know few good people browse /g/, let them answer too. But more or less this is the procedure you have to go through.
If you are applying for comanies like google or amazon, they wont hire based on roles but rather your brogramming skills, then aftewrwards you get a role.