what is null 2 &1

Whatever that is written to it, get discarded or disappears. When you run a...

Whatever that is written to it, get discarded or disappears. When you run a script that gives you an output and if we add a > /dev/null 2>&1 at the.

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2>&1 will redirect stderr to wherever stdout currently points to. Th...

2>&1 will redirect stderr to wherever stdout currently points to. The argument >/dev/null will redirect stdout to /dev/null i.e discard/silent the.

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I remember being confused for a very long time about the trailing garbage i...

I remember being confused for a very long time about the trailing garbage in commands I saw in Unix systems, especially while watching.

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/dev/null - standard file that discards all you write to it, but reports th...

/dev/null - standard file that discards all you write to it, but reports that the write operation succeeded. 1 is stdout and 2 is stderr. 2>&1 redirects.

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So if you say 2>&1 >/dev/null, it redirects stderr to point at wh...

So if you say 2>&1 >/dev/null, it redirects stderr to point at what stdout currently points at (which is probably a noop), then redirects stdout to.

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TL;DR: >/dev/null 2>&1 || true effectively silences the command, ...

TL;DR: >/dev/null 2>&1 || true effectively silences the command, throwing away any (error or normal) output and the result of the command, but.

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Hi. They're not the same. In the first case, standard output is direct...

Hi. They're not the same. In the first case, standard output is directed to a file (in this case /dev/null), and then standard error is directed to the  Size of file /dev/./null 2>&1 | Unix Linux Forums | AIX.

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In short, it redirects stderr (fd 2) to the black hole (discard output of t...

In short, it redirects stderr (fd 2) to the black hole (discard output of the command). Some more common use case. command > /dev/null 2>&1 &.

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With Shell Script this is not different, and a quite common idiom, but not ...

With Shell Script this is not different, and a quite common idiom, but not so well understood, is the 2>&1, like in ls foo > /dev/null 2>&1.

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I know this is probably a REAL basic question, but I'm not sure what t...

I know this is probably a REAL basic question, but I'm not sure what the difference is between >/dev/null 2>&1 -or- &> /dev/null in.

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For instance, if I have get-files.zone.id script, get-files.zone.id script,...

For instance, if I have get-files.zone.id script, get-files.zone.id script, I could simply execute on my terminal ]# php /path/to/my/get-files.zone.id and make the code executed.

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From: "Michael H. Warfield" ; To: redhat-list redhat com; Subject...

From: "Michael H. Warfield" ; To: redhat-list redhat com; Subject: Re: Meaning of > /dev/null 2>&1; Date: Sun Apr

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Explains how to redirect output and errors to /dev/null under UNIX / Linux ...

Explains how to redirect output and errors to /dev/null under UNIX / Linux / BSD shell @hourly /scripts/backup/get-files.zone.id >/dev/null 2>&1.

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В этой статье постараюсь объяснить эти странные команды. К примеру, у нас е...

В этой статье постараюсь объяснить эти странные команды. К примеру, у нас есть такая строчка: cron job command > /dev/null 2>&1.

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You have piped the second commands STDOUT and STDERR to /dev/null, and only...

You have piped the second commands STDOUT and STDERR to /dev/null, and only piped the first command's STDOUT to the second.

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