What does '2' and '&' mean in Bash?

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What does '2' and '&' mean in Bash?

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#1 by (14 votes)

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I'm starting to study Bash and while analyzing some code in Github, I came across the following excerpts to create a theme:

which rbenv &> /dev/null || return
$(node -v 2> /dev/null)

bash

asked by anonymous 02.03.2015 / 15:33

1 answer

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score 14 · Accepted Answer

which rbenv &> /dev/null || return
$(node -v 2> /dev/null)

which gets the path of rbenv and redirects stdout and stderr for /dev/null with &> , or || returns execution of node -v and redirects to < in> stderr , 2> .

Where:

which : Gets the path of a file.
& : Symbol used to specify a file descriptor , when there is no descriptor, redirect to stdout and stderr .

02.03.2015 / 15:42