Я пробовал следующее на Ubuntu Server 18.04:
apt install -y ceph
track errors:
Setting up ceph-common (12.2.13-0ubuntu0.18.04.2) ...
dpkg: **error processing package ceph-common (--configure):
installed ceph-common package post-installation script subprocess returned error exit status 6
Errors were encountered while processing:
ceph-common
E: Sub-process /usr/bin/dpkg returned an error code (1)**