Why users have to logoff to let ACL permission changes come into effect ?

Solution Verified - Updated -

Issue

  • When a ACL for a file is updated, the change does not take effect until the user log off and log in again.
  • For example, a user is logged in to the system. According to ACL entry, the user have write access to the file and a ACL change is made to revoke the write access. But, the user is still able to write to the file, until the user logs off and log in again.
  • Instant change in effect of ACL permissions are important and essential to some of the software.

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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