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2 FAQ tagged "log message"

• Linux ntpd sendto() Bad file descriptor error and solution :

  Q. I’m using Red hat Enterprise Linux server. I’m getting following error in /var/log/message file:
  Apr 16 16:38:02 server ntpd[22694]: sendto(10.0.77.54): Bad file descriptor
  Apr 16 16:38:08 server ntpd[22694]: sendto(66.111.46.200): Bad file descriptor
  Apr 16 16:38:25 server ntpd[22694]: sendto(83.133.111.7): Bad file descriptor
  Apr 16 16:38:28 server ntpd[22694]: sendto(81.169.156.100): Bad file descriptor

  How do I fix above errors?
  A. If you are [...]

• How to: Detect ARP Spoofing under UNIX or Linux :

  Q. I would like to know - how do I detect ARP spoofing? I am using Debian Linux.
  A. Use arpwatch command to keeps track for ethernet/ip address pairings. It logs message or activity to syslogs and reports certain changes via email.
  Arpwatch uses pcap to listen for arp packets on a local ethernet interface.
  Install arpwatch
  Use [...]

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