O sistema é um servidor Ubuntu 12.04 - e está um pouco quebrado:
root@IT-JOBPROLIN0:~# sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
5 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? Y
Setting up initramfs-tools (0.99ubuntu13.5) ...
update-initramfs: deferring update (trigger activated)
Setting up gconf2 (3.2.5-0ubuntu2) ...
dpkg: error processing gconf2 (--configure):
subprocess installed post-installation script returned error exit status 127
Setting up libpam-cap (1:2.22-1ubuntu3) ...
Can't exec "md5sum": No such file or directory at /usr/share/perl/5.14/IPC/Open3.pm line 186, <STDIN> line 11.
open2: exec of md5sum failed at /usr/sbin/pam-auth-update line 396
dpkg: error processing libpam-cap (--configure):
subprocess installed post-installation script returned error exit status 2
Setting up libpam-ck-connector (0.4.5-2ubuntu0.1) ...
Can't exec "md5sum": No such file or directory at /usr/share/perl/5.14/IPC/Open3.pm line 186, <STDIN> line 11.
open2: exec of md5sum failed at /usr/sbin/pam-auth-update line 396
dpkg: error processing libpam-ck-connector (--configure):
subprocess installed post-installation script returned error exit status 2
Setting up libpam-gnome-keyring (3.2.2-2ubuntu4.1) ...
Can't exec "md5sum": No such file or directory at /usr/share/perl/5.14/IPC/Open3.pm line 186, <STDIN> line 11.
open2: exec of md5sum failed at /usr/sbin/pam-auth-update line 396
dpkg: error processing libpam-gnome-keyring (--configure):
subprocess installed post-installation script returned error exit status 2
No apport report written because MaxReports is reached already
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-3.2.0-55-generic
/usr/sbin/mkinitramfs: 183: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 183: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 183: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 183: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 183: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 183: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 243: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 253: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 306: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 329: /usr/sbin/mkinitramfs: find: not found
/usr/sbin/mkinitramfs: 6: /usr/sbin/mkinitramfs: find: not found
E: mkinitramfs failure find 127 cpio 0 gzip 0
update-initramfs: failed for /boot/initrd.img-3.2.0-55-generic with 1.
dpkg: error processing initramfs-tools (--configure):
subprocess installed post-installation script returned error exit status 1
No apport report written because MaxReports is reached already
Errors were encountered while processing:
gconf2
libpam-cap
libpam-ck-connector
libpam-gnome-keyring
initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@IT-JOBPROLIN0:~#
Eu encontrei uma solução.
De alguma forma, a última atualização massiva do sistema apt-get update && apt-get upgrade criou o problema com initramfs .
Eu entrei em /var/lib/dpkg/info e renomei o arquivo initramfs-tools.postinst . Então eu corri apt-get update && apt-get upgrade novamente, e o sistema reconstruiu e reconfigurou / recriou este arquivo e agora tudo parece estar ok.