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Top Forums Shell Programming and Scripting Bash script to replace text file from a lookup file Post 302939092 by jonesn2000 on Sunday 22nd of March 2015 03:06:39 PM
Old 03-22-2015
Bash script to replace text file from a lookup file

Hi. I need assistance with the replacing of text into a specific file via a bash script.

My bash script, once run, currently provides a menu of computer names to choose.The script copies onto my system various files, depending what computer was selected in the menu.This is working OK.

Now, I need to update certain other files depending on what computer was selected.I have created an example scenario below.
I have a file called mainfile.txt and a lookup file called lookupfile.txt.
If I run my script and chose the option for Computer A, a variable is set in my script, e.g. $ComputerA

What I now need is for the ‘DomainName=’ in my mainfile.txt to update with the full domain name of ComputerA that’s detailed in the lookupfile.txt

Lookupfile.txt
Code:
ComputerAcomputerA.testdomain.com192.168.1.1
ComputerBcomputerB.testdomain.com192.168.2.1
ComputerCcomputerC.testdomain.com192.168.3.1

Mainfile.txt
Code:
DomainName=

From researching the issue I believe I can use awk or sed.However, I have had difficulty finding examples like I to get it working.
Can anyone provide a solution (and possibly an explanation of the solution).I can re-format my lookup.txt file if required Many thanks.

Last edited by Don Cragun; 03-22-2015 at 04:55 PM.. Reason: Get rid of dozens of font and size tags; add CODE tags.
 

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DPKG-WWW(1)						      General Commands Manual						       DPKG-WWW(1)

NAME
dpkg-www - program to remotely open a WWW Debian package browser SYNOPSIS
dpkg-www [-s|--stdout] [-h|--host host] [query] DESCRIPTION
dpkg-www is used to remotely control a WEB browser and open a dpkg URL on the local host from an interactive shell or script. If the command is invoked while running under X-window the script will try to find an installed X browser to open the specified URL. If not running under X it will try to use a text browser instead. If Netscape is found and a Netscape instance is already running it will be asked to open the dpkg URL on localhost with the optional query supplied on the command line. If there is no browser running, it will start automatically a new one. The functionality provided by this program is identical to running a web browser with the -remote openURL(http://localhost/cgi-bin/dpkg) argument or opening the same URL from within the browser. dpkg-www-installer is an helper application which can configured in the WWW browser for web installation. It should never be invoked directly by the user. OPTIONS
-s, --stdout Redirect output to stdout. Requires one of the text browsers (lynx, lynx-ssl or links) installed. -h, --host host Send the query to a remote host, where dpkg-www must be installed. query Specifies an optional package name, an absolute pathname or a query argument which is passed to the dpkg cgi-bin. See dpkg-www(8) for more information about the use of the cgi. FILES
/etc/dpkg-www.conf ~/.dpkg-www Configuration files for dpkg-www. It is not necessary for these files to exist, there are sensible defaults for everything, but you can specify your preferred www browser with the DPKG_WWW_BROWSER variable, for example: DPKG_WWW_BROWSER=mozilla EXAMPLES
dpkg-www This would open a dpkg URL on localhost listing all the installed packages. dpkg-www bash This would open a dpkg URL asking info on the bash package. dpkg-www -h pisolo bash This would open a dpkg URL asking info on the bash package on host pisolo. dpkg-www 'dpkg*' This would open a dpkg URL listing all packages matching dpkg*. dpkg-www /bin/bash This would open a dpkg URL asking info on the package(s) owning the file /bin/bash . dpkg-www depends=svgalib This would open a dpkg URL listing all packages depending on svgalib. dpkg-www --stdout depends=awk | grep ^ii This would list on stdout all packages depending on awk and grep all lines of installed packages. SEE ALSO
dpkg(8), dpkg-www(8) AUTHOR
Massimo Dal Zotto <dz@debian.org>. Bugs should be reported via the normal Debian bug reporting system. LICENCE
dpkg-www is licensed under the GNU General Public License version 2. September 1, 2004 DPKG-WWW(1)
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