我使用此方法创建了 Ubuntu 16.04 持久实时闪存驱动器https://askubuntu.com/a/853839
当我尝试升级时：
root@ubuntu:~# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
3 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 cryptsetup (2:1.6.6-5ubuntu2.1) ...
update-initramfs is disabled since running on read-only media
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
insserv: Service checkroot has to be enabled to start service cryptdisks-early
insserv: exiting now!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package cryptsetup (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of ubiquity:
ubiquity depends on cryptsetup; however:
Package cryptsetup is not configured yet.
dpkg: error processing package ubiquity (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of ubiquity-frontend-gtk:
ubiquity-frontend-gtk depends on ubiquity (= 2.21.63.6); however:
Package ubiquity is not configured yet.
dpkg: error processing package ubiquity-frontend-gtk (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
cryptsetup
ubiquity
ubiquity-frontend-gtk
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@ubuntu:~#