dpkg: 4 expected program(s) not found on PATH.

[Freaky]

Hallo liebe Pinguinfreunde,

Mein Debian Server lässt sich seit Heute plötzlich nicht mehr updaten:

root@debian:~# apt-get update
Hit http://security.debian.org stable/updates/main Packages
Hit http://security.debian.org stable/updates/main Release
Hit http://security.debian.org stable/updates/main Sources
Hit http://security.debian.org stable/updates/main Release
Hit http://non-us.debian.org stable/non-US/main Packages
Hit http://non-us.debian.org stable/non-US/main Release
Hit http://packages.dotdeb.org ./ Packages
Hit http://packages.dotdeb.org ./ Release
Hit http://sources.dotdeb.org ./ Sources
Ign http://sources.dotdeb.org ./ Release
Hit ftp://ftp.uni-erlangen.de stable/main Packages
Hit ftp://ftp.uni-erlangen.de stable/main Release
Hit ftp://ftp.uni-erlangen.de testing/main Sources
Hit ftp://ftp.uni-erlangen.de testing/main Release
Reading Package Lists... Done
Building Dependency Tree... Done
root@debian:~# apt-get upgrade
Reading Package Lists... Done
Building Dependency Tree... Done
The following packages have been kept back
mysql-client mysql-server php5-mysql
13 packages upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
4 packages not fully installed or removed.
Need to get 0B/5628kB of archives. After unpacking 1721kB will be used.
Do you want to continue? [Y/n] y
Preconfiguring packages ...
dpkg: `ldconfig' not found on PATH.
dpkg: `start-stop-daemon' not found on PATH.
dpkg: `install-info' not found on PATH.
dpkg: `update-rc.d' not found on PATH.
dpkg: 4 expected program(s) not found on PATH.
NB: root's PATH should usually contain /usr/local/sbin, /usr/sbin and /sbin.
E: Sub-process /usr/bin/dpkg returned an error code (2)
root@debian:~#

Weiters hab ich:

root@debian:~# apt-get -f install
Reading Package Lists... Done
Building Dependency Tree... Done
0 packages upgraded, 0 newly installed, 0 to remove and 16 not upgraded.
4 packages not fully installed or removed.
Need to get 0B of archives. After unpacking 0B will be used.
dpkg: `ldconfig' not found on PATH.
dpkg: `start-stop-daemon' not found on PATH.
dpkg: `install-info' not found on PATH.
dpkg: `update-rc.d' not found on PATH.
dpkg: 4 expected program(s) not found on PATH.
NB: root's PATH should usually contain /usr/local/sbin, /usr/sbin and /sbin.
E: Sub-process /usr/bin/dpkg returned an error code (2)
root@debian:~#

Wie sind diese Dateien plötzlich nicht mehr im Pfad?

Danke!

lg,
Freaky