ntop is a network probe that shows network usage in a way similar to what top does for processes. In interactive mode, it displays the network status on the user's terminal. In Web mode, it acts as a Web server, creating an HTML dump of the network status. It sports a NetFlow/sFlow emitter/collector, an HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics. ntop requires rrdtool, which is also available at Slackbuilds.org. ntop needs to run under its own user/group. This has been assigned to the following by SlackBuilds.org, but feel free to change it on your system for consistency with local assignments. User: ntop UID: 212 GID: 212 group: ntop GID: 212 If you want to change that, you'll need to change the script and the rc.ntop to reflect your changes. Logs are placed in /var/log/ntop/ and will be rotated every week. The log rotation will restart the ntop server which will reset the ntop statistics. If you want to keep the statistics you have to edit or delete the /etc/logrotate.d/ntop file. If you want to start ntop on system bootup: /etc/rc.d/rc.local ================== # Startup ntop if [ -x /etc/rc.d/rc.ntop ]; then /etc/rc.d/rc.ntop start fi /etc/rc.d/rc.local_shutdown =========================== # Stop ntop if [ -x /etc/rc.d/rc.ntop ]; then /etc/rc.d/rc.ntop stop fi Additionally, you'll have to set the rc script to be executable just like any other Slackware rc script. # chmod +x /etc/rc.d/rc.ntop When ntop is installed at the first time, you MUST set the administration password for ntop (user 'admin'). You do that by running ntop with the option -A (or --set-admin-password) as root. # /usr/bin/ntop -P -u -A For example: # /usr/bin/ntop -P /var/lib/ntop -u ntop -A It will prompt you for the password and then exit. Running ntop: Once ntop has started and configured correctly, you should be able to look at all the data it's collected by pointing your browser at: http://localhost:3000/