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Full Discussion: Replace string of a file with a string of another file for matches using grep,sed,awk
Top Forums Shell Programming and Scripting Replace string of a file with a string of another file for matches using grep,sed,awk Post 303026449 by Paras Pandey on Wednesday 28th of November 2018 04:51:07 AM
Old 11-28-2018
Replace string of a file with a string of another file for matches using grep,sed,awk
I have a file comp.pkglist which mention package version and release . In 'version change' and 'release change' line there are two versions 'old' and 'new' Version Change: --> Release Change: -->

Code:
cat comp.pkglist 
Package list:  nss-util-devel-3.28.4-1.el6_9.x86_64 
Version Change: 3.28.4 --> 3.36.0 
Release Change: 1.el6_9 --> 1.el6 

Package list:   tzdata-2018e-3.el6.noarch 
Version Change: 2018e --> 2018g 
Release Change: 3.el6 --> 1.el6

for every package name I need to search in /tmp directory and replace it`s version from old version to new version and old release to new release:

Code:
grep -ri -n tzdata /tmp/. 
/tmp/core.pkglist:578:package tzdata                  2018e 3.el6    arch noarch  

sed -i '578s/2018e/2018g/' /tmp/core.pkglist // To replace '2018e by 2018g in 578th line.

How can I make it work for all packages in the comp.pkglist file to replace it`s old version to new version and old release to new release in any file under the directory /tmp.

The script should :
1) Run a loop with inputs as the name of the package in the comp.pkglist.
2) It should then grep for that package name in the /tmp directory to know which file contains the package.
Code:
grep -ri -n tzdata /tmp/. /tmp/core.pkglist:578:package tzdata                  2018e 3.el6    arch noarch

3) Then it should replace old version/old release of the same package with new version.
Code:
 sed -i '578s/2018e/2018g/' /tmp/core.pkglist

Last edited by RudiC; 11-28-2018 at 07:38 AM.. Reason: Changed ICODE to CODE tags.
 

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PYCENTRAL()															       PYCENTRAL()

NAME

       pycentral - register and build utility for Python packages

SYNOPSIS

       pycentral [-h] [-v] <cmd> [<cmd options>] [<args>]

DESCRIPTION

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	provides support for installing python modules independent
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OPTIONS

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	      Remove the byte compiled .py files.

       list   List all managed files.

       pkginstall
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       pkgprepare
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       debhelper
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       version
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FILES

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SEE ALSO

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