I have an old PC running a couple of VMs and it has an old 19" display and keyboard for emergencies. It’s text only (80x25, maybe), no Wayland. What cool thing can I put on the display? Are there any text based graphs or charts?
Try the btop, it’s fancy
Of the tops out there, btop is my favorite followed by glances. They are all useful, I just like the way btop presents the data
For basic stats, probably just htop. But you can set any of those status viewers as the shell of a custom user, and configure it to login into that user automatically for the physical tty1 (so the display)
You could step up a level and use btop! More numbers!
asciiquarium?
I love asciiquarium
Maybe htop? It’s pretty configurable and has decent bars for various resources.
Also if your reason for choosing pure TUI is just resource usage (and not the aesthetics of it / cool feeling / whatever else), then you could maybe look into running something like Sway or Xorg+i3 - those are very lightweight, well suited for single window usage, and open up a lot of possibilities for lightweight GUI apps.
It’s a VGA connection and, yes, my primary concern is resource usage. I’m running 2-3 VMs on it so that I can easily migrate the VM around.