root@ubuntu:~# apt-get install iptraf
Reading package lists… DoneBuilding dependency treeReading state information… DoneThe following packages were automatically installed and are no longer required: xserver-xorg-video-amd linux-headers-2.6.24-12-generic libntfs8 linux-headers-2.6.24-12Use ‘apt-get autoremove’ to remove them.The following NEW packages will be installed: iptraf0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.Need to get 166kB of archives.After this operation, 762kB of additional disk space will be used.