Through LuCI, I can see, on Status -> Memory the amount of total, free, and buffered memory (let's say, RAM) I have on my router. Is there any easy way to check this same info on the terminal, and so not need to open LuCI?
I know checking the System -> Software space available is easy, with df -h.
If you happen to have enough storage, you can also install htop. If you prefer top's functionality over free, then between top and htop I find htop way easier on the eye.