Real time network checking on application ?
 

I want to monitor an application lets say that it will be apache2 to see how many in real-time it takes network resources such as upload/download per second how can i do that in linux (cmd not gui) ?
I know it's possible because i can see this in windows in my nod32 firewall monitoring.
Any software which do that on linux ?

to monitor http traffic in real time you can use iftop

-n means don't look up hostnames
-P means show the port used for connections
-f means use a filter
"port http" means filter on the port called http

It gives an average of 2 seconds, 10 seconds and 40 seconds for each connection plus a running total.

man iftop

What if i don't want to monitor apache2 but some other application which runs for example on 7654 port?

Well I would guess that you would use 7654 instead of http.
Standard ports can be listed by name, otherwise be specific.
is identical to

If you just use iftop -nP if the port has a name it will appear in the listing.