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Verify Local DNS Configuration for server connectivity issues

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  • Objective: Identify misconfigurations in DNS settings.
  • Checks:
  1. /etc/hosts: cat /etc/hosts
  2. /etc/resolv.conf: cat /etc/resolv.conf
  3. /etc/nsswitch.conf: cat /etc/nsswitch.conf
  4. (Optional) Check interface-specific DNS settings in /etc/sysconfig/network-scripts/ifcfg-<interface>.
  • Outcome:
  1. Correct any misconfigurations found in DNS settings and retest connectivity by pinging the hostname.


cat /etc/hosts cat /etc/resolv.conf cat /etc/nsswitch.conf cat /etc/sysconfig/network-scripts/ifcfg-<interface>
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