How to cause /etc/resolv.conf changes to take effect for running applications

Solution Verified - Updated -

Issue

  • Do I need to restart any services for changes to /etc/resolv.conf to take effect?
  • Are changes to the /etc/resolv.conf detected automatically?
  • Running processes are using old /etc/resolv.conf entries
  • How to force /etc/resolv.conf entries to update for running services

Environment

  • Red Hat Enterprise Linux

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