Ubuntu
unattended-upgrades package

  1. Artful (17.10)
  2. Bug #1624644
  3. Comment #25

Comment 25 for bug 1624644

Revision history for this message
Jarno Suni (jarnos) wrote : Re: By default settings unattended-upgrade is unable to automatically remove packages that become unused in conjunction with updating by other software.

It will remove the third newest kernel, but later, when the one you installed by "apt install" will become third newest, it will not be removed automatically. That is by design.