Configuring nfsen/nfdump on ubuntu

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http://askubuntu.com – I have configured nafsen/nfdump on ubuntu. When I restart nfsen, it shows following message: khalid-Dell-System-Inspiron-N4110:/data/nfsen/bin# ./nfsen stop Shutdown nfcapd: (MYROUTER)[no collector] . Shutdown nfsend:[12057].. khalid-Dell-System-Inspiron-N4110:/data/nfsen/bin# ./nfsen start Starting nfcapd:(MYROUTER)Receive socket error: could not open the requested socket Terminated due to errors. : collector did not start - see logfile Starting nfsend. # /var/log/syslog Sep 13 16:40:16 khalid-Dell-System-Inspiron-N4110 nfsen[18303]: Signal 'end-periodic' Sep 13 16:40:16 khalid-Dell-Syst (HowTos)