Comment 28 for bug 1929255

focal:
link_in_boot = no

# dpkg-query -W linux-base
linux-base 4.5ubuntu3.5

# Two regular flavours
# ls -latr / | grep -- '->' | grep boot | sort
lrwxrwxrwx 1 root root 29 Jun 23 13:40 vmlinuz.old -> boot/vmlinuz-5.4.0-78-generic
lrwxrwxrwx 1 root root 32 Jun 23 13:40 initrd.img.old -> boot/initrd.img-5.4.0-78-generic
lrwxrwxrwx 1 root root 32 Jun 23 13:57 vmlinuz -> boot/vmlinuz-5.4.0-78-lowlatency
lrwxrwxrwx 1 root root 35 Jun 23 13:57 initrd.img -> boot/initrd.img-5.4.0-78-lowlatency

# selfbuilt
installkernel 5.13.0-051300rc7-generic image/boot/vmlinuz-5.13.0-051300rc7-generic modules/boot/System.map-5.13.0-051300rc7-generic
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 5.13.0-051300rc7-generic /boot/vmlinuz-5.13.0-051300rc7-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 5.13.0-051300rc7-generic /boot/vmlinuz-5.13.0-051300rc7-generic
update-initramfs: Generating /boot/initrd.img-5.13.0-051300rc7-generic
run-parts: executing /etc/kernel/postinst.d/xx-update-initrd-links 5.13.0-051300rc7-generic /boot/vmlinuz-5.13.0-051300rc7-generic
I: /vmlinuz.old is now a symlink to boot/vmlinuz-5.4.0-78-lowlatency
I: /initrd.img.old is now a symlink to boot/initrd.img-5.4.0-78-lowlatency
I: /vmlinuz is now a symlink to boot/vmlinuz-5.13.0-051300rc7-generic
I: /initrd.img is now a symlink to boot/initrd.img-5.13.0-051300rc7-generic

# ls -latr / | grep -- '->' | grep boot | sort
lrwxrwxrwx 1 root root 32 Jun 23 14:04 vmlinuz.old -> boot/vmlinuz-5.4.0-78-lowlatency
lrwxrwxrwx 1 root root 35 Jun 23 14:04 initrd.img.old -> boot/initrd.img-5.4.0-78-lowlatency
lrwxrwxrwx 1 root root 37 Jun 23 14:04 vmlinuz -> boot/vmlinuz-5.13.0-051300rc7-generic
lrwxrwxrwx 1 root root 40 Jun 23 14:04 initrd.img -> boot/initrd.img-5.13.0-051300rc7-generic