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Full Discussion: Help on cat with sed!
Top Forums Shell Programming and Scripting Help on cat with sed! Post 302338528 by kbalaji_uk on Tuesday 28th of July 2009 07:20:11 AM
Old 07-28-2009
Help on cat with sed!
Hi All!

I have a script having one statement like.

cat xfile | sed 's/A/a/g' > xfile

I have two boxes which have similar version of linux running but one is greater in speed compared to other. Lets say A is faster than B.

A which is faster writes output as NULL
B which is slower comparatively to A writes the entire content with A replaced to a
. Though I know its not a good practice. I want to know why is this behavior. Is there some delay writing in one compared to the other ? I remmeber comming across this jargon in buffer cache

Thanks
Balaji Kamal Kannadassan
 

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LEARN ABOUT CENTOS

create_makefiles

CREATE_MAKEFILES()														CREATE_MAKEFILES()

NAME

       create_makefiles - Recreates all Makefiles beneath a directory

SYNOPSIS

       create_makefiles [dir]

DESCRIPTION

       create_makefiles recreates all Makefiles in dir and its (recursed) subdirectories from the corresponding Makefile.am templates.

       This script must be run from the toplevel directory (the one containing configure). This script saves time compared to re-running configure
       completely.

       If the source directory is different from the build directory (see the environment variables below), it will be assumed that each
       Makefile.am and Makefile.in belongs beneath the source directory and that each Makefile belongs beneath the build directory.

       This utility is part of the KDE Software Development Kit.

ENVIRONMENT

       One of the following variables (but not both) should be set if the source directory is different from the build directory. If the build
       directory is simply a subdirectory of the source directory, the simpler variable OBJ_SUBDIR should be used.

       OBJ_SUBJDIR
	   Indicates that the build directory is in the given subdirectory of the source directory. For instance, if the source directory is
	   kdesdk and the build directory is kdesdk/obj-i386-linux, then OBJ_SUBDIR should be set to obj-i386-linux.

       OBJ_REPLACEMENT
	   A sed expression that is used to transform the source directory into the build directory. For instance, if the source directory is
	   kdesdk/obj-i386-linux, then OBJ_REPLACEMENT should be set to s#kdesdk#kdesdk-obj#.

SEE ALSO

       create_makefile(1) make(2)

AUTHORS

       create_makefiles was written by David Faure<faure@kde.org>.

       This manual page was prepared by Ben Burton<bab@debian.org> for the Debian GNU/Linux system (but may be used by others).

																CREATE_MAKEFILES()
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