Question: How to Monitor Realtime Network Traffic in Ubuntu / Debian /Mint ?
Answer:
What you need to do is to install ifstat tool, from terminal run the following command
sudo apt-get install ifstat
Now run ifstat
$ifstat Output
eth0 wlan0 vmnet1 vmnet8
KB/s in KB/s out KB/s in KB/s out KB/s in KB/s out KB/s in KB/s out
1.29 1.74 0.00 0.00 0.00 0.00 0.00 0.00 29.08 28.83 0.00 0.00 0.00 0.00 0.00 0.00