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Top Forums Shell Programming and Scripting Replace line in files using script. Post 302424406 by Scrutinizer on Tuesday 25th of May 2010 07:13:29 AM
Old 05-25-2010
Hi, try this:

Code:
sed -i "19s/.*/$newline/" /var/etc/debsvr.cfg

sed is a stream editor. Since your using debian it will probably have the -i (in place) option. This command goes to line 19 and replaces everything on that line with the content of shell variable $newline and write the result back (in place) to the same file.
 

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DH_INSTALLDEBCONF(1)						     Debhelper						      DH_INSTALLDEBCONF(1)

NAME
dh_installdebconf - install files used by debconf in package build directories SYNOPSIS
dh_installdebconf [debhelperoptions] [-n] [--params] DESCRIPTION
dh_installdebconf is a debhelper program that is responsible for installing files used by debconf into package build directories. It also automatically generates the postrm commands needed to interface with debconf. The commands are added to the maintainer scripts by dh_installdeb. See dh_installdeb(1) for an explanation of how that works. Note that if you use debconf, your package probably needs to depend on it (it will be added to ${misc:Depends} by this program). Note that for your config script to be called by dpkg, your postinst needs to source debconf's confmodule. dh_installdebconf does not install this statement into the postinst automatically as it is too hard to do it right. FILES
debian/package.config This is the debconf config script, and is installed into the DEBIAN directory in the package build directory. Inside the script, the token #DEBHELPER# is replaced with shell script snippets generated by other debhelper commands. debian/package.templates This is the debconf templates file, and is installed into the DEBIAN directory in the package build directory. debian/po/ If this directory is present, this program will automatically use po2debconf(1) to generate merged templates files that include the translations from there. For this to work, your package should build-depend on po-debconf. OPTIONS
-n, --no-scripts Do not modify postrm script. -- params Pass the params to po2debconf. SEE ALSO
debhelper(7) This program is a part of debhelper. AUTHOR
Joey Hess <joeyh@debian.org> 11.1.6ubuntu2 2018-05-10 DH_INSTALLDEBCONF(1)
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