8:~# LC_ALL=C apt-get install perl-base
Reading package lists... Done
Building dependency tree... Done
perl-base is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
Need to get 0B of archives.
After unpacking 0B of additional disk space will be used.
Setting up console-common (0.7.60) ...
Looking for keymap to install:
NONE
mount: can't find /proc in /etc/fstab or /etc/mtab
umount: /proc: must be superuser to umount
invoke-rc.d: initscript keymap.sh, action "start" failed.
dpkg: error processing console-common (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 console-common
E: Sub-process /usr/bin/dpkg returned an error code (1)