How to enable Mandatory Locking using "mand" option

Solution Verified - Updated -

Issue

  • How to enable Mandatory Locking using mand option in Red Hat Enterprise Linux?
  • Why server is not able to use mand mount option in Red Hat Enterprise Linux 8?
  • mand mount option can be used in RHEL 7 and 9 but it is giving error in RHEL8.

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

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