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Full Discussion: Best way to edit a file
Top Forums Shell Programming and Scripting Best way to edit a file Post 302480378 by skunky on Tuesday 14th of December 2010 05:46:27 PM
Old 12-14-2010
Best way to edit a file
looking for a script or command to push out from a centralized machine to multiple machines. I have the software in place that will do this already, but I need to tell it what command to run on each machine with this file.

what I need is a script or command to edit a file in a specific manner. Say I have a file such as the one below. What I need to do is search the file for a specific line, in this case the line "users_here[tab space]u1=usera,userb,userc", and delete the text "usera,". I don't want it to remove ALL instances of "usera" throughout the file, and I don't want to output this to a new file. I need to search the file for the line, remove 'usera' if it's in THAT specific line, and leave the file intact after it edits/removes "usera" from that line. Any help with this?

#
user_goHere
user2_goHere
users_here[tab space]u1=usera,userb,userc
users_there[tab space]u2=user1,user2,user3

here is more text in the file that also contains usera, but i don't want it delete this one. here's another usera, but i don't want it to remove this either.
and here is some more text in the file.
#
 

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LEARN ABOUT CENTOS

install-catalog

INSTALL-CATALOG(8)														INSTALL-CATALOG(8)

NAME

       install-catalog - Manage a SGML or XML centralized catalog

SYNOPSIS

       install-catalog [ option ]  action  ... [  [ -d]  [ --delegate] ]  [  [ -a centralized ordinary]  [ --add centralized ordinary]

	[ -r centralized ordinary]  [ --remove centralized ordinary]

	[ -h]  [ --help]

	[ -v]  [ --version] ]

DESCRIPTION

       This shell script allows to handle a centralized catalog referencing other "ordinary" SGML or XML Open Catalogs.

       An  Open  Catalog  contains a set of directives defined by OASIS, mostly used for defining equivalences between FPIs (Formal Public Identi-
       fiers) and real file names (see TR9401:1997 on  http://www.oasis-open.org  <URL:http://www.oasis-open.org>).   The  Open  Catalogs  usually
       reside in /usr/share/sgml.

       A  centralized catalog is a special Open Catalog that includes only comments and CATALOG directives pointing to other catalogs (or DELEGATE
       directives if supported). The centralized catalog can be the key to all other SGML resources. It usually resides in /etc/sgml.

       The centralized catalog can be edited manually or through the install-catalog script to add or remove references to  other  ordinary  cata-
       logs. This script is mainly destined to software package post-installation scripts.

       An example of a typical call to install-catalog is:

	     install-catalog --add 
	       /usr/share/sgml/docbook/dsssl-stylesheets-1.54/catalog 
	       /etc/sgml/sgml-docbook-4.0.cat

       This call will install in /etc/sgml/sgml-docbook-4.0.cat a reference to /usr/share/sgml/docbook/dsssl-stylesheets-1.54/catalog.

OPTIONS

       Here is the list of options that can influence the way install-catalog works:

	[  [ -d]  [ --delegate] ]

       Use DELEGATE instead of CATALOG directives to specify a pointer

ACTIONS

       Here is the list of actions that can be requested to install-catalog:

	[  [ -a centralized ordinary]  [ --add centralized ordinary] ]

       Declare a new SGML package.

	[  [ -r centralized ordinary]  [ --remove centralized ordinary] ]

       Remove a previously installed SGML package.

	[  [ -h]  [ --help] ]

       Print a short help message and exit

	[  [ -v]  [ --version] ]

       Print the version identifier and exit

FILES

       /etc/sgml/*

       The SGML centralized catalogs

AUTHORS

       Eric Bischoff <ebisch@cybercable.tm.fr>

       Developper of install-catalog.

SEE ALSO

       jw(1)

       conversion from DocBook to other file formats

       nsgmls(1)

       a base component of Jade DSSSL engine

       http://sourceware.cygnus.com/docbook-tools/ <URL:http://sourceware.cygnus.com/docbook-tools/>

       the home page of the DocBook tools, a compendium of all tools necessary to process DocBook files, including the SGML-common stuff.

								  04 August 2000						INSTALL-CATALOG(8)
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