mkusb can modify the apt settings for persistent live drives, but that
is to avoid unattended upgrades, and it changes the visual status seen
at the 'Updates' tab in 'Software & Updates'. Otherwise mkusb clones the
iso file to a partition and extracts some boot stuff (for grub booting)
to [another] FAT partition. And for this test, I did *not* let mkusb
tamper with any of the files in /etc/apt/apt.conf.d, so I declined the
offer in the pop up window, where it can be selected.
-o-
When I made the fix in mkusb for this problem, I inspected the files in
the directory
/etc/apt/apt.conf.d
with the settings 'when there are security updates:' for
- Download and install automatically (which causes unattended upgrades) and
- Display automatically (which does not cause unattended upgrades).
After that I simply made mkusb change the files to be exactly like the
were for 'Display immediately'. I let mkusb write to corresponding files
in the casper-rw partition "$targ1"
And it works when I test it in Xenial and Yakkety. There is no need for
this fix in the previous versions.
from the mkusb shell-script:
---
# change: 'Download and install automatically' to 'Display immediately'
if $chk_upgrd
then
/bin/echo -e \
"$inversvid set security upgrade action to 'Display immediately' $resetvid"
umount "$targ1" 2>&1
mount "${tu}5" "$targ1" 2>&1
mkdir -p "$targ1"/upper/etc/apt/apt.conf.d/
echo 'APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";
APT::Periodic::Unattended-Upgrade "0";' \
> "$targ1"/upper/etc/apt/apt.conf.d/10periodic
cp -p "$targ1"/upper/etc/apt/apt.conf.d/10periodic \
"$targ1"/upper/etc/apt/apt.conf.d/20auto-upgrades
else
/bin/echo -e "$inversvid keep current security upgrade settings $resetvid"
fi
---
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1619188
Title:
Unattended upgrades can break persistent live media
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1619188/+subscriptions
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