Abortive install of libc6 removes ldconfig

[Vik]

I tried manually installing libc6_2.10.1-0ubuntu15_i386.deb and it failed due to a dependency on libc-bin. Fair enough. Unfortunately the fail took out ldconfig. Without ldconfig dpkg will not run! Fortunately I was able to copy ldconfig off another machine and recover (not shown):

vik@kereru:/mnt/moa/Ubuntu/cache$ sudo dpkg -i libc6_2.10.1-0ubuntu15_i386.deb
(Reading database ... 404136 files and directories currently installed.)
Preparing to replace libc6 2.9-4ubuntu6.1 (using libc6_2.10.1-0ubuntu15_i386.deb) ...
Removing obsolete conffile /etc/init.d/glibc.sh ...
Checking for services that may need to be restarted...
Checking init scripts...
Unpacking replacement libc6 ...
dpkg: dependency problems prevent configuration of libc6:
 libc6 depends on libc-bin (= 2.10.1-0ubuntu15); however:
  Package libc-bin is not installed.
dpkg: error processing libc6 (--install):
 dependency problems - leaving unconfigured
Processing triggers for man-db ...
Errors were encountered while processing:
 libc6
vik@kereru:/mnt/moa/Ubuntu/cache$ sudo dpkg -i libc6_2.10.1-0ubuntu15_i386.deb libc-bin_2.10.1-0ubuntu15_i386.deb
dpkg: `ldconfig' not found on PATH.
dpkg: 1 expected program(s) not found on PATH.
NB: root's PATH should usually contain /usr/local/sbin, /usr/sbin and /sbin.
vik@kereru:/mnt/moa/Ubuntu/cache$ echo $PATH
/home/vik/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/vik/bin:/home/vik/bin
vik@kereru:/mnt/moa/Ubuntu/cache$ which ldconfig
vik@kereru:/mnt/moa/Ubuntu/cache$

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: libc6 2.10.1-0ubuntu15
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_NZ.UTF-8
 SHELL=/bin/bash
SourcePackage: eglibc
Uname: Linux 2.6.28-15-generic i686
UnreportableReason: This is not a genuine Ubuntu package