Errors already at initial steps of "installing Ubuntu 16.04 as root ZFS w/ Ubiquity installer"

[max2go]

apt-get update:
"Error while moving old database out of the way. AppStream cache update failed."

apt-get zfs-initramfs:
E: Invalid operation zfs-initramfs

apt-get install zfs-initramfs although installs, but issues message:
"update-initramfs is disabled since running on read-only medium"

[ghost]

You need to apt-get INSTALL zfs-initramfs. You can ignore the message.

[ghfields]

This was fixed by @englert on November 20th, 2016 by adding the word install to that line. The error did not pass on to the 16.10, and 17.04 versions of this wiki.

I chose to use the "apt-get install zfs-initramfs" as opposed to the "apt-get install ubuntu-zfs" on the livecd, because it matches the command needed later within the chroot. The guide is meant to be the most direct route to a root zpool, and repeating the command seems in that spirit.

I believe this ticket can be closed. Let me now if you feel otherwise.