Have a look at mrtg http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/, this may be just what you want. There´s also a debianized package IIRC. hth, &rw On Tue, 15 Aug 2000 10:35:22 BST, Wilson Yau writes: >Could anyone suggest any handy GNU utilities that can investigate the >usage of the bandwidth of a network?