[Solved] Shell echo not scrolling output?

Question

linux

There is a simple script made by a noob:

#!bin/sh
while true
 do
 a=`ipfw show | grep ng |wc -l`
 b=`date | cut -c12-19`
 sleep 1
 echo "$b Currently alive sessions: $a"
 done

And, accordingly, the question is:
When the script is running, it constantly produces a new line with the result, how to organize it so that it would not display a new line constantly, but update the existing one?

Answer 1

askubuntu.com/a/16151

Answer 2

And yet, using the example of sh, and not bash, I decided like this:

#!bin/sh
while true
 do
 a=`ipfw show | grep ng |wc -l`
 b=`date | cut -c12-19`
 sleep 1
printf "$b Current ng interfaces count is:$a \r"
 done

Suddenly someone young will fly in search of a similar solution, I will advise you - man printf

Answer 3

man is unsupportable? :)
echo -n "some shit..."