Netspeed is just a little GNOME-applet that shows how much traffic occurs on a specified network device (for example eth0).
I like this little applet because of what it looks like,see the screenshot:
It also shows some details on the selected network device (right-click on previous pic -> Device Details).
Install and configure Netspeed in Ubuntu Gnome
Download appropriate package and double-click on the package to install:
Or,get the Netspeed from :
After install Netspeed,right-click on top-panel’s blank area and choose “Add to Panel”,search “netspeed” and click “Add” so you will see the first screenshot on top-panel.