I've searched online for a long time.... but today I found it is not that complicated to run MRTG on a FreeBSD server.
People recommended that installing net-snmpd first before MRTG. Somehow, since I have a FreeBSD 7.2, it has bsnmpd already.
So, all we have to do is to activate bsnmpd by adding the line, [ bsnmpd_enable="YES" ] in /etc/rc.conf .
Then, as usual, cd to /usr/ports/net-mgmt/mrtg to complete the installation.
After installing, do cfgmaker to configure everything as following.
In CLI:
cfgmaker --global 'WorkDir: /usr/local/www/apache22/data/mrtg' --global 'Options[_]: growright, bits' --global 'WithPeak[_]: wmy' public@localhost > /usr/local/etc/mrtg/mrtg.cfg
Next, the index:
indexmaker --title 'MRTG' --addhead='' --output /usr/local/www/apache22/data/mrtg/index.html --columns=1 --nolegend /usr/local/etc/mrtg/mrtg.cfg
Last, run mrtg for about three times till no error messages.
mrtg /usr/local/etc/mrtg/mrtg.cfg
Add mrtg to crontab! (per 5 min)
*/5 * * * * /usr/local/bin/mrtg /usr/local/etc/mrtg/mrtg.cfg
