Debian Squeeze não pode instalar o php-pear

Eu uso o Debian 6.0.6

sudo apt-get install php-pear

resulta em:

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 initscripts : Breaks: console-setup (< 1.74) but 1.68+squeeze2 is to be installed
               Breaks: initramfs-tools (< 0.104) but 0.98.8 is to be installed
               Breaks: nfs-common (< 1:1.2.5-3) but 1:1.2.2-4squeeze2 is to be installed
 keyboard-configuration : Breaks: console-setup (< 1.71) but 1.68+squeeze2 is to be installed
 klibc-utils : Breaks: initramfs-tools (< 0.103) but 0.98.8 is to be installed
E: Broken packages

Como posso resolver isso?

Você está executando uma distribuição mista (stable / testing / etc) ou usando repositórios secundários?

sudo apt-get install php-pear
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  libonig2 libqdbm14 php5-cli php5-common
Suggested packages:
  php5-dev
Recommended packages:
  php5-suhosin
The following NEW packages will be installed:
  libonig2 libqdbm14 php-pear php5-cli php5-common
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 4,167 kB of archives.
After this operation, 12.3 MB of additional disk space will be used.
Do you want to continue [Y/n]? n
Abort.

cat /etc/debian_version 
6.0.6

Se este for o caso, você deve fazer o downgrade de todas as versões do pacote não-mainstream e tentar novamente.

Tenho certeza que você fez, mas no caso:

apt-get update 
apt-get upgrade
apt-get install php-pear 

tente executar comandos nesta ordem.

tipos