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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

fixnt

fixnt(1)							      Debian								  fixnt(1)

NAME

       fixnt - Filter for the Windows NT postscript printer driver.

SYNOPSIS

       fixnt < BADFILE.ps > GOODFILE.ps

DESCRIPTION

       The  Windows  NT  postscript  driver has a tendency to make broken postscript files, that are incompatible with psutils.  fixnt is a filter
       that fixes these problems, allowing the use of psnup(1).

       The filter takes the broken postscript file on stdin, and outputs a fixed postscript file on stdout.  It has no other form  for	invocation
       and takes no options on the command-line.

OPTIONS

       fixnt  takes no options.

BUGS

       fixnt does not check for NTPSOct94.  For a workaround, use a sed(1) command to replace 'NTPSOct94' with 'NTPSOct95', like so:
	      sed 's/NTPSOct94/NTPSOct95/g'
       This is particularly important for Windows NT 3.5 users.

AUTHOR

       fixnt   was   written   by   Holger   Bauer   <Holger.Bauer@topmail.de>,  Michael  Rath	<rath@itsm.uni-stuttgart.de>,  and  Akim  Demaille
       <demaille@inf.enst.fr>.

REPORTING BUGS

       Report bugs to the Authors, but avoid sending large postscript files.

       Patches are always welcome; send to <bauer@itsm.uni-stuttgart.de>.

SEE ALSO

       psnup(1), sed(1)

a2ps								   February 2003							  fixnt(1)
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