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Asked: 2026-05-27T18:23:35+00:00

In AIX, I tried to redirect both STDERR & STDOUT to /dev/null but the

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In AIX, I tried to redirect both STDERR & STDOUT to /dev/null but the redirection doesn’t seems to be happening. What might be the problem?

bash-3.2#  /usr/sbin/lsgroup Test-Group | grep kbxb025 > /dev/null 2>&1
Group "Test-Group" does not exist.
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  1. Editorial Team

    Redirections refer to commands, not whole pipelines. The outputs of grep go into /dev/null, but not those of lsgroup. To solve these issues, group the pipeline into a subshell:

    ( /usr/sbin/lsgroup Test-Group | grep kbxb025; ) > /dev/null 2>&1
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