Why the number of "lsof" looks higher than "ulimit"

Solution Verified - Updated -

Issue

  • Why the number of "lsof" looks higher than "ulimit".
$ ulimit -n
1024
$ lsof -u jack | wc -l
6907

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5

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