nload allows your to view your current network bandwidth activity for both incoming and outgoing connections, live as it happens.
For Ubuntu use the following command:
apt-get install nload
For Centos use the following command
yum install epel-release yum install nload
To access nload just type in:
You can use the left and right keys on your keyboard to switch between different network cards. Alternatively you can use the command below to view all your network activity
Source: G7 Cloud