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Full Discussion: Delete values between 2 patterns
Top Forums Shell Programming and Scripting Delete values between 2 patterns Post 302903079 by protocomm on Saturday 24th of May 2014 02:59:48 AM
Old 05-24-2014
Quote:
Originally Posted by Don Cragun
I should have said BREs rather than back references, but the times I most often see a sed substitute command fail is when I'm using back references. On the Linux sed man page provided in these forums, you'll find:

I don't currently have access to a Linux system and I can't give a clear statement of what POSIX.2 BRE features are not supported by the Linux sed utility, but I have seen several cases in these forums where a standards conforming sed script (such as the one protocomm posted in this thread:
Code:
sed -n 's|\([0-9]*\.[0-9]*\.[A-Z0-9]*\)\(\.[0-9]*\.[0-9]*\)\(.*\)|\1\3|p'

or a similar suggestion I would have made until I saw protocomm's suggestion and the statement that it didn't work:
Code:
sed 's/^\([[:alnum:]]*[.][[:alnum:]]*[.][[:alnum:]]*\)[.[:alnum:]]*/\1/' input.txt

) fail on the GNU utilities version of sed but work as specified by the standards with an AIX, HP/UX, OS X, or Solaris system sed utility.
Don Cragun, your line code works fine on my macbook.
 

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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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