Suppressing sh script output when using <<END

Question

I want to insert commands into an interactive environment using the following method:

bc <<END
1+1
quit
END

The output of the example is '2' and it appears after typing END. Suppose I would want to suppress this output. So after typing END I don't want any output to appear. How could I accomplish this?

fedorqui · Accepted Answer · 2013-08-05 11:52:59Z

2

You can accomplish it redirecting the output of bc to /dev/null:

$ bc &>/dev/null <<END
1+1
quit
END

Note that using & > /dev/null both stdout and stderr will be sent to /dev/null, so not output will appear at all.

answered Aug 5, 2013 at 11:52

fedorqui

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2 Comments

red Over a year ago

Thanks, this works. My mistake was that I tried putting > /dev/null after the END. I will accept your answer.

fedorqui Over a year ago

To be honest, my first attempt was also like that :)

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