In this case I had to fix some startup links in a Networker Debian package. If I recall correctly it was after I had to use alien to create a .deb package from the vendor's rpm packages.

Package made with alien caused the following errors:

<pre class="brush: bash; title: ; notranslate" title="">
# dpkg -i lgtoclnt_7.5.1-2_amd64.deb
Selecting previously deselected package lgtoclnt.
(Reading database ... 22181 files and directories currently installed.)
Unpacking lgtoclnt (from lgtoclnt_7.5.1-2_amd64.deb) ...
Setting up lgtoclnt (7.5.1-2) ...
/bin/ln: creating symbolic link `/etc/init.d/rc2.d/S95networker': No such file or directory
/bin/ln: creating symbolic link `/etc/init.d/rc2.d/K05networker': No such file or directory
...
/bin/ln: creating symbolic link `/etc/init.d/rc5.d/K05networker': No such file or directory

Package info:

<pre class="brush: bash; title: ; notranslate" title="">
# dpkg --info lgtoclnt_7.5.1-2_amd64.deb
 new debian package, version 2.0.
...
 Package: lgtoclnt
 Version: 7.5.1-2
 Architecture: amd64
...
 Description: NetWorker Client
 EMC NetWorker protects the critical business data of more than 10,000
 enterprise customers worldwide by simplifying, centralizing, and automating
 backup and recovery operations across Unix, Windows, Linux and NetWare platforms
 in DAS, NAS, and SAN storage environments. Built upon an open, highly scalable
 client-server architecture, NetWorker reduces management overhead by providing
 "lights out" protection of storage assets in the largest corporate data centers
 and the smallest satellite branch offices.
 .
 (Converted from a rpm package by alien version 8.72.)

Uncompress with ar:

<pre class="brush: bash; title: ; notranslate" title="">
# ls
 lgtoclnt_7.5.1-2_amd64.deb

# ar vx lgtoclnt_7.5.1-2_amd64.deb
 x - debian-binary
 x - control.tar.gz
 x - data.tar.gz

Uncompress control file:

<pre class="brush: bash; title: ; notranslate" title="">
# tar xzpf control.tar.gz

Now make your changes to pre and post scripts.

Package control.tar.gz

<pre class="brush: bash; title: ; notranslate" title="">
# tar cpf control.tar control md5sums postinst postrm preinst prerm
# rm control md5sums postinst postrm preinst prerm

Package the .deb with ar:

<pre class="brush: bash; title: ; notranslate" title="">
# ar -r lgtoclnt_7.5.1-2_amd64.deb debian-binary control.tar.gz data.tar.gz
 ar: creating lgtoclnt_7.5.1-2_amd64.deb

Install:

<pre class="brush: bash; title: ; notranslate" title="">
# dpkg -i lgtoclnt_7.5.1-2_amd64.deb
 Selecting previously deselected package lgtoclnt.
 (Reading database ... 22181 files and directories currently installed.)
 Unpacking lgtoclnt (from lgtoclnt_7.5.1-2_amd64.deb) ...
 Setting up lgtoclnt (7.5.1-2) ...
 To install EMC HomeBase Agent run the below script as 'root' user:
 /opt/homebase-agent/setup-homebase.sh

Show installed package:

<pre class="brush: bash; title: ; notranslate" title="">
# aptitude show lgtoclnt
 Package: lgtoclnt
 New: yes
 State: installed
 Automatically installed: no
 Version: 7.5.1-2
 Priority: extra
 Section: alien
 Maintainer: root <root@bermuda>
 Uncompressed Size: 144M
 Description: NetWorker Client
 EMC NetWorker protects the critical business data of more than 10,000 enterprise customers worldwide by simplifying, centralizing, and
 automating backup and recovery operations across Unix, Windows, Linux and NetWare platforms in DAS, NAS, and SAN storage environments.
 Built upon an open, highly scalable client-server architecture, NetWorker reduces management overhead by providing "lights out"
 protection of storage assets in the largest corporate data centers and the smallest satellite branch offices.

(Converted from a rpm package by alien version 8.72.) (Updated postinst and postrm files to be dpkg friendly and start in runlevel 2 )
 (-- rrosso 10.21.09)

Although my goal was fix the packaged version, you can also fix startup scripts on Debian and friends with update-rc.d. Example:

<pre class="brush: bash; title: ; notranslate" title="">
 root@clnt:/etc/init.d# touch testscript
# update-rc.d testscript defaults
 update-rc.d: warning: /etc/init.d/testscript missing LSB information
 update-rc.d: see <http://wiki.debian.org/LSBInitScripts>
 Adding system startup for /etc/init.d/testscript ...
 /etc/rc0.d/K20testscript -> ../init.d/testscript
 /etc/rc1.d/K20testscript -> ../init.d/testscript
 /etc/rc6.d/K20testscript -> ../init.d/testscript
 /etc/rc2.d/S20testscript -> ../init.d/testscript
 /etc/rc3.d/S20testscript -> ../init.d/testscript
 /etc/rc4.d/S20testscript -> ../init.d/testscript
 /etc/rc5.d/S20testscript -> ../init.d/testscript

# update-rc.d -f testscript remove
 Removing any system startup links for /etc/init.d/testscript ...
 /etc/rc0.d/K20testscript
 /etc/rc1.d/K20testscript
 /etc/rc2.d/S20testscript
 /etc/rc3.d/S20testscript
 /etc/rc4.d/S20testscript
 /etc/rc5.d/S20testscript
 /etc/rc6.d/K20testscript