Bandwidth
Monitor monthly internet Transmit and Receive bandwidth usage - Linux
... information from the router itself, rather we have to rely on the logging into our ISP, to discover if we are approaching the bandwidth limit.
Bandwidth logger, runs a daemon that notes how much traffic is passing through
your network interface.
Bandwidth logger was written to install on a system using 'systemd' but can be configured to run under 'upstart'.
An upstart script "/usr/share/bandwidth/bandwidth.upstart.conf" is included but will have to installed manually for those using 'upstart'.