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Full Discussion: Piping commands
Top Forums UNIX for Dummies Questions & Answers Piping commands Post 302786715 by iliya24 on Thursday 28th of March 2013 05:19:20 AM
Old 03-28-2013
Piping commands

Hi
I am tryin to undertand piping

command1|command2

from what i learn output of cammand 2 is an intput for command 1 right?

If so .
What dose next sequence do


cat f1 >> f2 | grep '^[A-Da-F]'

I think it takes context of f1 and Concatenate's it to f2 and then looks for ....i don't know..
Thx.
 

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CHALLENGED(1)							    DOSE Tools							     CHALLENGED(1)

NAME
dose-challenged - detect broken packages due to obsolete dependencies SYNOPSIS
dose-challenged [options] Packages file(s) DESCRIPTION
dose-challenged performs a speculative analysis of the repository to identify those packages that, if upgraded to a specific version, would break a large number of other packages in the repository. This tool would be particularly useful during the upgrade of a specific component to evaluate its impact on the software archive. Input Specification The input of dose-challenged is a list of Debian Packages files Output Specification The output of dose-challenged is in the yaml format. Options -b --broken Print the list of broken packages -d --downgrade Check package downgrades -c Print the list of packages in a cluster --checkonly Select a subset of packages to check. By default all packages are checked. -v Enable info / warnings / debug messages. This option may be repeated up to three times in order to increase verbosity. --progress Enable progress bars. -h, --help Display this list of options. EXAMPLE
dose-challenged -v --progress Packages.bz2 > result.yaml NOTE
AUTHOR
Pietro Abate and Roberto Di Cosmo SEE ALSO
dose-distcheck(1) dose-outdated(1) <http://www.mancoosi.org> is the home page of the Mancoosi project. dose3 3.0.2 2012-10-03 CHALLENGED(1)
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