Linux command output not getting redirected

Question

Why doesn't the output get redirected in this case. The user doesn't have permission to write in /proc hence the error but why the error isn't going to /dev/null?

$echo "core_%e.%p" > /proc/sys/kernel/core_pattern 2>&1 > /dev/null

-bash: /proc/sys/kernel/core_pattern: Permission denied

None of these work either.$echo "core_%e.%p" > /proc/sys/kernel/core_pattern 2>&1 1> /dev/null $ echo "core_%e.%p" > /proc/sys/kernel/core_pattern 1> /dev/null 2>&1 $ echo "core_%e.%p" > /proc/sys/kernel/core_pattern > /dev/null 2>&1 — Vibhu
– Vibhu, Commented Aug 22, 2015 at 11:31

pasaba por aqui · Accepted Answer · 2015-08-22 11:45:30Z

1

Try with:

echo "core_%e.%p" 2>/dev/null > /proc/sys/kernel/core_pattern 2>&1

that will send stdout and stderr to "core_pattern", if possible, if not, ends without message.

edited Aug 22, 2015 at 11:45

answered Aug 22, 2015 at 11:37

pasaba por aqui

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Vibhu · Accepted Answer · 2015-08-22 11:41:07Z

0

works too:

bash -c 'echo "core_%e.%p" > /proc/sys/kernel/core_pattern' > /dev/null 2>&1

answered Aug 22, 2015 at 11:41

Vibhu

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