How to set sysctl variables on Red Hat Enterprise Linux

Solution Verified - Updated -

Issue

  • How do I persistently set sysctl variables on Red Hat Enterprise Linux?
  • How to immediately set a sysctl kernel parameter in RHEL?
  • How to set back sysctl parameters to default values?

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 10

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