piping the output of find command to grep - UNIX for Dummies Questions & Answers

435 Gavea · #1 10-05-2006

Hi,

I did not understand why the following did not work out as I expected:

find . -name "pqp.txt" | grep -v "Permission"

I thought I would be able to catch whichever paths containing my pqp.txt file without receiving the display of messages such as "find: cannot access... Permisson denied", but it did not work.

Anyone could explain me the reason why ?

Thanks,
Abraham

vgersh99 · #2 10-05-2006

what you're "grepping out' is displayed to stderr, not stdout.

redirect stderr [2] to stdout [1] like so:

Code:

find . -name 'pqp.txt' 2>&1 | grep -v 'Permission'

or better yet redirect stderr to '/dev/null':

Code:

find . -name 'pqp.txt' 2>/dev/null

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