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.
Depends on the kind of server - Linux, yes, command line all the way. Windows (and Active Directory and other Microsoft stuff) you use GUI mostly in combination with some PowerShell scripts (often running on the “command line”).
There are still people running Windows Servers? An Active Directory Domain Controller can easily be set up on Linux.