[Bug 1357093] Re: Kernels not autoremoving, causing out of space error on LVM or Encrypted installation or on any installation, when /boot partition gets full

[Ian Weisser]

Another (complimentary) solution for accumulating kernels in an LVM
environment: http://blog.surgut.co.uk/2016/11/boot-less-lvm-rootfs-in-
zesty.html

The fix to this bug prevents kernels from accumulating. 
That complimentary solution eliminates the tiny /boot partition, eliminating the space problem on LVM desktops and laptops...though not on other space-constrained devices.

My updated u-u on Ubuntu 16.04 and 16.10 is working just great, and
correctly preventing kernels from accumulating. However, we have seen
similar-looking apt problems in the support forums: A few systems to
continue to run out of /boot space. Upon investigation, these are
usually due to unconfigured/half-configured packages or user confusion
with the settings.

If your unattended-upgrade is not working properly, and your system
continues to run out of /boot space, please seek help in a support forum
before posting permanently to this CLOSED bug report.

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https://bugs.launchpad.net/bugs/1357093

Title:
  Kernels not autoremoving, causing out of space error on LVM or
  Encrypted installation or on any installation, when /boot partition
  gets full

Status in unattended-upgrades package in Ubuntu:
  Fix Released

Bug description:
  Currently if one chooses to use LVM or encrypted install, a /boot
  partition is created of 236Mb

  Once kernel updates start being released this partition soon fills
  until people are left unable to upgrade.

  While you and I might know that we need to watch partition space, many
  of the people we have installing think that a windows disk is a disk
  and not a partition, education is probably the key - but in the
  meantime support venues keep needing to deal with the fact the
  partition is too small and/or old kernels are not purged as new ones
  install.

  For workaround and sytem repair, see
  https://help.ubuntu.com/community/Lubuntu/Documentation/RemoveOldKernels

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