Bandwidth Monitoring with NTop (Network Top)
Problems/Issues during Installation/configuration:
1) Unable to start NTOP Service.
[root@yourmachine ~] /etc/rc.d/init.d/ntop start
Starting ntop: Processing file /etc/ntop.conf for parameters…
Tue Feb 10 15:17:06 2009 NOTE: Interface merge enabled by default
Tue Feb 10 15:17:06 2009 Initializing gdbm databases
FATAL ERROR: Unrecognized/unprocessed ntop options…
, –user ntop, , –db-file-path /var/ntop, , , , –use-syslog, , , , , , ,
run ntop –help for usage information
Common problems:
-B “filter expressions” (quotes are required)
–use-syslog=facilty (the = is required) [FAILED]
Solutions: This problem is highly reported since the release of an update ntop-3.3.8-1.el5.rf there is bug in init script of ntop. What you need is to modify the ntop init script. Follow me you will do it.
[root@yourmachine ~] vi /etc/rc.d/init.d/ntop
### locate the start() function
#————————-
start () {
echo -n $”Starting $prog: “
# daemon $prog -d -L @/etc/ntop.conf # modify this line
daemon $prog @/etc/ntop.conf -d -L
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/\$prog
return $RETVAL
}
#————————-
Save and exit and again try to start ntop service
[root@yourmachine ~] /etc/rc.d/init.d/ntop start
Starting ntop: Processing file /etc/ntop.conf for parameters…
Tue Feb 10 15:25:34 2009 NOTE: Interface merge enabled by default
Tue Feb 10 15:25:34 2009 Initializing gdbm databases [ OK ]
2) Missing Dot Tool.
No worries, install graphvis rpm from rpmforge via yum.
[root@yourmachine ~] yum install graphviz
Set permission on “dot”
[root@yourmachine ~] chmod 777 /usr/bin/dot
I know it is not a good practice but for the time use it.
Now set dot path.
I hope you have enjoyed installation of Ntop.
