Or is that more of a stereotype, and there are some (maybe more?) out there using some form of graphical interfaces/web dashboards/etc.?
It’s struck me as interesting how when you look up info about managing servers that they primarily go through command-line interfaces/terminals/etc. It’s made me wonder how much of that’s preference and how much of it’s an absence of graphical interfaces.
Speaking from ~20 years experience: Yes, mainly. But both GUIs and web dashboards are common and widespread. It varies wildly based on what type of server you’re maintaining and what type of organization you’re in.
If you run a custom Minecraft server via some online service, you’ll be going through a web dashboard.
Typical corporate or government IT tends to be Windows/GUI based, but of course with as much automation as possible in the form of global policy settings.
Typical small web development shop tends to be via code configuration and web dashboards on rented hosts.
Typical SAAS-provider type company tends to be strictly command-line but as little as possible, and try to have everything via configuration, rules, deployment scripts, etc checked into a version control system.
It’s extremely varied, but to my understanding it is correct that command line is most common.