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Full Discussion: Why is this command not working? (sed)
Top Forums Shell Programming and Scripting Why is this command not working? (sed) Post 302955954 by funksen on Thursday 24th of September 2015 05:35:26 AM
Old 09-24-2015
Why is this command not working? (sed)
Hi guys,

the command is

Code:
 echo "Online Memory                              : 32768 MB" | sed 's/.*\([0-9]+\).*/\1/'

I would expect it to print 32768, it cuts off any character to the first digit, then gets all digits in 1, cuts off the rest after the digits, and should print 32768, instead it prints everything again


of course in this case, the easiest thing would be
Code:
echo "Online Memory                              : 32768 MB" | sed 's/[^0-9]//g'

but I'm just curious why the first command doesn't work

thanks in advance

funksen
 

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LEARN ABOUT DEBIAN

impressive-gettransitions

IMPRESSIVE-GETTRANSITIONS(1)				      Debian GNU/Linux manual				      IMPRESSIVE-GETTRANSITIONS(1)

NAME

       impressive-gettransitions - Generate Impressive info scripts for LaTeX presentations

SYNOPSIS

       impressive-gettransitions FILE.tex

DESCRIPTION

       A simple script to produce a .info file for use with Impressive, using special comments in a LaTeX/Beamer file. FILE.tex is a file to be
       parsed into .info file. For each /fullpath/blah.tex /fullpath/blah.pdf.info gets produced.

SYNTAX

       In the LaTeX document, impressive-gettransitions counts the pages to determine the PDF slide number of each one.

       The simpler page changes are automatically detected, that is:
	   egin{frame} and:
	   pause

       Other, more elaborated page changes must be noted with a %O comment:
	   item<1-> Foo
	   item<2-> Bar %O

       The transition to apply can be specified in a %O comment:
	   egin{frame} %O SlideUp

OPERATION

       When the .info file corresponding to the LaTeX document already exist, impressive-gettransitions does not clear it, but only adds the
       transitions if finds to it.

       Thus, if you modified your document in a way that requires to completely replace the transitions, manually clear the PageProps section of
       the .info file. This can be done by running the following sed command:
	   sed -i -e "/^PageProps = {/,/^}/d" FILE.info

SEE ALSO

       impressive(1)

AUTHOR

       impressive-gettransitions (originally gettransitions) has been written by Rob Reid.

       This manpage has been originally written by Yaroslav Halchenko <debian@onerussian.com>.

Debian Project							    2012-02-10					      IMPRESSIVE-GETTRANSITIONS(1)
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