apt autoremove updates grub?

[Cap]

When using apt-get remove it lists,

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The following packages were automatically installed and are no longer required:
  linux-headers-5.3.0-46 linux-headers-5.3.0-46-generic linux-headers-5.3.0-51
  linux-headers-5.3.0-51-generic linux-headers-5.3.0-53
  linux-headers-5.3.0-53-generic linux-headers-5.3.0-59
  linux-headers-5.3.0-59-generic linux-image-5.3.0-46-generic
  linux-image-5.3.0-51-generic linux-image-5.3.0-53-generic
  linux-image-5.3.0-59-generic linux-modules-5.3.0-46-generic
  linux-modules-5.3.0-51-generic linux-modules-5.3.0-53-generic
  linux-modules-5.3.0-59-generic linux-modules-extra-5.3.0-46-generic
  linux-modules-extra-5.3.0-51-generic linux-modules-extra-5.3.0-53-generic
  linux-modules-extra-5.3.0-59-generic
Use 'sudo apt autoremove' to remove them.

I typed sudo apt autoremove. I expect this only to remove the no longer required files however it outputs many lines such as,

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/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-5.3.0-46-generic
/etc/kernel/postrm.d/zz-update-grub:

Generating grub configuration file ...

Adding boot menu entry for EFI firmware configuration
done

File descriptor 10 (/var/lib/dpkg/triggers/linux-update-5.3.0-46-generic (deleted)) leaked on lvs invocation. Parent PID 7235: /bin/sh
Adding boot menu entry for EFI firmware configuration

Why is it changing the boot menu and grub? Is it normal?

[Moonstone Man]

Why is it changing the boot menu and grub? Is it normal?

apt autoremove removes, amongst other things, old kernels, so this obviously affects grub because grub is used to select older kernels, hence if an old kernel is removed, grub must be updated otherwise you'd have a grub that was configured for kernels that no longer exist.

[Cap]

apt autoremove removes, amongst other things, old kernels, so this obviously affects grub because grub is used to select older kernels, hence if an old kernel is removed, grub must be updated otherwise you'd have a grub that was configured for kernels that no longer exist.

It was a mistake. I thought it was deleting unused temporary files left over from an update install process.

Does that mean I have removed all kernels other than the most new kernel?

[Moonstone Man]

Does that mean I have removed all kernels other than the most new kernel?

You'd have to check the output of ls on your boot directory. I can't recall for certain if it keeps one older kernel or keeps only the most recent kernel. I can't tell you for sure because I've just this minute finished a clean install so I have nothing to remove for testing it for you.

[all41]

I believe apt doesn't remove kernels that have been manually added.

You can just add those puppies back using Update Manager--toolbar/Tools/Linux kernels.
Click on the one you want and choose install. This also will update grub automatically.
Grub will by default boot to the highest installed kernel number.

[Cap]

Thank you

[DB [NOT Cooper]]

Having just verified the last Kernel update didn't seem to break anything, I ran apt autoremove in Tricia (19.3). I can confirm it leaves the previous Kernel intact.

Moving on to post my own question....