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Asked: 2026-06-10T22:08:52+00:00

I’ve found the following bash command in some source code. exec 3>&1 > >(logger

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I’ve found the following bash command in some source code.

exec 3>&1 > >(logger -t "OKOK")

What does it exactly mean?

As far as I know, it redirects those log to the syslog.

However, What is 3>&1?

I have never seen a file descriptor of 3 before.

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1 Answer

  1. Editorial Team

    unusual indeed, but it does exist:

    Each open file gets assigned a file descriptor. The file descriptors for stdin, stdout, and stderr are 0, 1, and 2, respectively. For opening additional files, there remain descriptors 3 to 9. It is sometimes useful to assign one of these additional file descriptors to stdin, stdout, or stderr as a temporary duplicate link. This simplifies restoration to normal after complex redirection and reshuffling

    Find out more on the IO redirection page.

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