Install NTOP in Ubuntu by: Onno W. Purbo # apt-get install rrdcollect rrdtool rrdtool-tcl # apt-get install ntop # mkdir /var/lib/ntop/rrd # mkdir /var/lib/ntop/rrd/graphics # mkdir /var/lib/ntop/rrd/flows # mkdir /var/lib/ntop/rrd/interfaces # mkdir /var/lib/ntop/rrd/interfaces/eth0 # mkdir /var/lib/ntop/rrd/interfaces/eth1 # mkdir /var/lib/ntop/rrd/interfaces/eth2 # chown -Rf ntop.root /var/lib/ntop # chmod -Rf 777 /var/lib/ntop/rrd (dangerous) # ntop --set-admin-password passwordadmin # ntop --interface eth0 # /etc/init.d/ntop start