This app was mentioned in 3 comments, with an average of 1.33 upvotes
I've recently started to use JuiceSSH and it is brilliant. Some of the add-ons are pretty cool as well, like the performance monitor if you want to quickly check a server https://play.google.com/store/apps/details?id=com.sonelli.juicessh.performancemonitor
There's an app called performance monitor that does this without having to code or install anything on the server.
https://play.google.com/store/apps/details?id=com.sonelli.juicessh.performancemonitor
For Ubuntu there's JuiceSSH Performance Plugin, though it doesn't cover all you'd like (no temps or alerts).