My current job is all Ubuntu LTS, my job before that was all CentOS, and my job before that was a mixture of Debian and FreeBSD.
this post was submitted on 25 Jul 2023
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I work for a big enterprise, we have RHEL on all our Linux servers save for a few that are SuSe for SAP.
I was working as a DWDM technician sometime ago and IIRC most of DWDM hardware (or at least the Infinera ones, as I had used those the most) were actually running on Gentoo, which was kinda surprising for me.
But in "regular" environments I have mainly seen Ubuntu or Debian.
Mostly cost. We used to run a lot of Oracle databases and they have become extremely expensive to keep running. So we are migrating to PostgreSQL. The servers were getting migrated to CentOS but now that RedHat fucked that distro we are going back to RedHat. Part of that deal is switching from chef to Ansible. So to save costs we are consolidating to a single vendor.
For learning system administration, I think Cent OS Stream can be a great choice. Not because it offers something special than others but because it would familiarize you with the RHEL/Fedora family and in my experience majority of enterprise-servers are using one of its family members, be it RHEL, the former CentOS, Oracle Linux, Amazon Linux or some other variant.
So what are the biggest differences. Or is it mostly the same? Also thanks for the responses!
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At work: Alpine-based docker containers. Flatcar Container Linux for host VMs.
Personally: Ubuntu Server. Some alpine docker containers.