bash 在 AIX 中将 STDERR 和 STDOUT 重定向到 /dev/null 失败
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Redirecting STDERR & STDOUT to /dev/null in AIX fails
提问by Prakash
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?
在 AIX 中,我尝试将 STDERR 和 STDOUT 都重定向到 /dev/null,但重定向似乎没有发生。可能是什么问题?
bash-3.2# /usr/sbin/lsgroup Test-Group | grep kbxb025 > /dev/null 2>&1
Group "Test-Group" does not exist.
回答by thiton
Redirections refer to commands, not whole pipelines. The outputs of grepgo into /dev/null, but not those of lsgroup. To solve these issues, group the pipeline into a subshell:
重定向指的是命令,而不是整个管道。grepgo into的输出/dev/null,但不是lsgroup. 要解决这些问题,请将管道分组为一个子 shell:
( /usr/sbin/lsgroup Test-Group | grep kbxb025; ) > /dev/null 2>&1

