`htop` is a popular command line tool for it in an interactive way. You may need to install it.
`ps` is the more standard tool for listing processes in a non interactive way. See `man ps` for usage. `kill` is the command to stop processes.
There may be something graphical these days but why?
I definitely see the case for no graphical interface for some of these things for sure. Seems like wasted resources, even though, I'm used to that.
I just don't do much in a GUI unless it really is central to the way the application works. Browser, and sadly discord are the two GUI applications I use much of. I'd put discord in an irssi session where it belongs if only the interface for such a thing were usable. Chatting by gif also does somewhat have its place -- but we had ASCII art which scratched a similar itch on irc.
GUI apps often have an easier learning curve but command line things are usually easier to streamline, automate, and only give the screen economy they deserve.
