16.04 - Can't upgrade kernel in xenial - Ask Ubuntu


i have problem 1 server. time ago there installed trusty, upgrade xenial. problem looks doesn't want newer kernel ;)

% uname -a

linux 36monkeys 3.11.0-12-generic #19-ubuntu smp wed oct 9 16:12:00 utc 2013 i686 i686 i686 gnu/linux

hm, 3.11? why?

% apt list --installed|grep linux  warning: apt not have stable cli interface. use caution in scripts.  console-setup-linux/xenial-updates,now 1.108ubuntu15.2 [installed,automatic] libselinux1/xenial,now 2.4-3build2 i386 [installed] linux-base/xenial,now 4.0ubuntu1 [installed,automatic] linux-firmware/xenial-updates,now 1.157.4 [installed,automatic] linux-generic/xenial-updates,xenial-security,now 4.4.0.45.48 i386 [installed] linux-headers-4.4.0-38/xenial-updates,xenial-security,now 4.4.0-38.57 [installed,automatic] linux-headers-4.4.0-38-generic/xenial-updates,xenial-security,now 4.4.0-38.57 i386 [installed,automatic] linux-headers-4.4.0-45/xenial-updates,xenial-security,now 4.4.0-45.66 [installed,automatic] linux-headers-4.4.0-45-generic/xenial-updates,xenial-security,now 4.4.0-45.66 i386 [installed,automatic] linux-headers-generic/xenial-updates,xenial-security,now 4.4.0.45.48 i386 [installed] linux-image-4.4.0-38-generic/xenial-updates,xenial-security,now 4.4.0-38.57 i386 [installed,automatic] linux-image-4.4.0-45-generic/xenial-updates,xenial-security,now 4.4.0-45.66 i386 [installed,automatic] linux-image-extra-4.4.0-38-generic/xenial-updates,xenial-security,now 4.4.0-38.57 i386 [installed,automatic] linux-image-extra-4.4.0-45-generic/xenial-updates,xenial-security,now 4.4.0-45.66 i386 [installed,automatic] linux-image-generic/xenial-updates,xenial-security,now 4.4.0.45.48 i386 [installed,automatic] linux-libc-dev/xenial-updates,xenial-security,now 4.4.0-45.66 i386 [installed,automatic] util-linux/xenial-updates,now 2.27.1-6ubuntu3.1 i386 [installed]

there nothing related 3.11... there menu.lst in /boot/grub entries related 3.11, removed file.

there nothing related 3.11 in /boot or /etc/default/grub, /initrd.img points boot/initrd.img-4.4.0-45-generic, /vmlinuz points boot/vmlinuz-4.4.0-45-generic etc.

what can upgrade kernel 4.4.x?

btw, after every change remembered update-grub, doing update-initramfs , rebooted server...

you mentioned you're using digitalocean droplet. method of kernel deployment differs system running on bare metal

refer digital ocean's documentation kernel upgrades.

to sum gotchas:

  • if you're using kernel provided control panel, you'll have make changes there, too.
  • reboot of droplet alone not upgrade kernel, shutdown does
  • you can select special grubloader kernel delegate kernel selection guest operaing system.

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