How to always show only the last line of the output?

Question

linux

I want to see in the terminal only the current disk loading. The utilities that I found show the log by time like this:

How can I make it always show only the last, most recent line?

Answer 1

So far, only such crutches:

dstat --disk-util -D sda > /tmp/dst.txt &
watch -t "tail -1 /tmp/dst.txt"

I would be glad if someone offers a better solution.

Answer 2

man tail

Answer 3

to make dstat friends with watch, you need to read man to the end:
watch -c dstat --disk-util -D sda 1 1
Well, or you can use your hands:

clear ;while true; do tput cup 0 0; dstat --disk-util -D sda 1 1;sleep 1;done

Answer 4

man watch

Answer 5

man dstat :)
dstat -D sda 1000000

Answer 6

atop