Comment 26 for bug 1929255

Hirsute:
link_in_boot = no

# dpkg-query -W linux-base
linux-base 4.5ubuntu5.2

# Two regular flavours
# ls -latr / | grep -- '->' | grep boot | sort
lrwxrwxrwx 1 root root 30 Jun 23 10:58 vmlinuz.old -> boot/vmlinuz-5.11.0-23-generic
lrwxrwxrwx 1 root root 33 Jun 23 10:58 initrd.img.old -> boot/initrd.img-5.11.0-23-generic
lrwxrwxrwx 1 root root 33 Jun 23 11:00 vmlinuz -> boot/vmlinuz-5.11.0-23-lowlatency
lrwxrwxrwx 1 root root 36 Jun 23 11:00 initrd.img -> boot/initrd.img-5.11.0-23-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-5.11.0-23-lowlatency
I: /initrd.img.old is now a symlink to boot/initrd.img-5.11.0-23-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 33 Jun 23 11:12 vmlinuz.old -> boot/vmlinuz-5.11.0-23-lowlatency
lrwxrwxrwx 1 root root 36 Jun 23 11:12 initrd.img.old -> boot/initrd.img-5.11.0-23-lowlatency
lrwxrwxrwx 1 root root 37 Jun 23 11:12 vmlinuz -> boot/vmlinuz-5.13.0-051300rc7-generic
lrwxrwxrwx 1 root root 40 Jun 23 11:12 initrd.img -> boot/initrd.img-5.13.0-051300rc7-generic