The command at always outputs "Warning: commands will be executed using /bin/sh" in Red Hat Enterprise Linux 8

Solution Verified - Updated -

Issue

  • The command at outputs as follow:

    　# /usr/bin/at now <<< job.sh 20210521132925161641804289383 8469308861616420210521132925
　Warning: commands will be executed using /bin/sh
　job 13 at Mon May 24 10:36:00 2021

Environment

  • Red Hat Enterprise Linux 8
  • at

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