Dynamic Bash Script (i.e top)

Question

I'm wondering if there is a method to have a bash script present data to the console and consistently update it. Much like the functionality of top, but in a more simple form.

Answer 1

watch -n 1 <your-command>

From the watch(1) man page:

Execute a program periodically, showing output full screen

Answer 2

You need to use curses for this. Here's one detailed article about curses usage.