[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

[Jarno Suni]

The reason why 'apt-get autoremove' is stated there is that it is a
simple working way in 16.04 and later for most users, if your system is
not broken already. purge-old-kernels is included in some Ubuntu
package; consequently it is supported by Launchpad's bug reporting
system. But as said in the document, it is currently deprecated and its
bugs will likely not be fixed. It might still be useful for some users
in some cases.

If one wants to use unattended-upgrades manually, he/she could disable
it from being called automatically. One should avoid installing security
updates manually by Software Updater in 14.04, if one expects to use apt
/unattended-upgrades for removing kernels automatically.

I have developed some software that makes the un-clogging part easier;
link to related bountysource.com page is included in the document. Just
feel free to post a bounty and/or give some feedback about the interface
in the respective Launchpad page. I guess the software could be launched
automatically in case of kernel clog when it happens in interactive
session (or even in non-interactive session, if the software is made to
support completely non-interactive un-clogging).

If you install a kernel manually in command line by say
sudo apt-get install linux-image-4.4.0-87-generic
which kernel(s) that command should remove in turn in your opinion? Or could it be that the user who runs the command should take care of it? User possibly wants to keep some spare kernels, in case the one that is just installed is bad. Or a developer may want to keep some testing kernels etc.

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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:
  New
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/RemoveOldKernels

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