I want to get the current Bandwidth of an interface say eth0 from the terminal. It better be as simple as possible. Say         up 10 dn 30.Instead of giving out a lot of text like vnstat does.  Edit: I need this for a command line program for auto-monitoring, not to view it manually.
How do I get the current bandwidth speed of an interface from the terminal?
monitoring;bandwidth
There are several tools that can do this. BmonOne that should be in most repositories for various distros is bmon.    It can be run in a condensed view too.           If you're looking for something else I'd suggest taking a look at this Linuxaria article titled: Monitor your bandwidth from the Linux shell. It also mentions nload as well as speedometer.Nload    Speedometer            IbmonitorIf you're looking for something more basic then you could also give ibmonitor a go. Though basic it has most of the features one would expect when monitoring bandwidth.            