grub / proxmox recovery image

Look in /etc/grub/grub.cfg :

for proxmox entry , similar to this :

menuentry 'MB Recover Proxmox VE GNU/Linux' --class proxmox --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-ddfe9089-a176-4112-9515-0ad598ae2ad8' {

     load_video

     insmod gzio

     if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi

     insmod part_gpt

     insmod lvm

     insmod ext2

     set root='lvmid/j2PveR-z1u1-8OR2-gnO9-OysQ-N49j-ZtJ3Aa/mTy7eR-xW1D-kiGQ-qhDj-CeVm-1ecH-jTeAHH'

     if [ x$feature_platform_search_hint = xy ]; then

       search --no-floppy --fs-uuid --set=root --hint='lvmid/j2PveR-z1u1-8OR2-gnO9-OysQ-N49j-ZtJ3Aa/mTy7eR-xW1D-kiGQ-qhDj-CeVm-1ecH-jTeAHH'  ddfe9089-a176-4112-9515-0ad598ae2ad8

     else

       search --no-floppy --fs-uuid --set=root ddfe9089-a176-4112-9515-0ad598ae2ad8

     fi

     echo    'Loading Linux 6.8.12-4-pve-mb ...'

     linux   /boot/custom/vmlinuz-6.8.12-4-pve-mb root=/dev/mapper/pve-root ro  quiet

     echo    'Loading initial ramdisk ...'

     initrd  /boot/custom/initrd.img-6.8.12-4-pve-mb

}

copy the enty to /etc/grub.d/40_custom

change initrd and linux to your image and kernel name

copy existing images and kernel to your name into a new dir under /boot

mkdir /boot/custom

cp /boot/vmlinuz-6.8.12-4-pve /boot/custom/vmlinuz-6.8.12-4-pve-mb

cp /boot/initrd.img-6.8.12-4-pve /boot/custom/initrd.img-6.8.12-4-pve-mb

then
update-grub

check /etc/grub/grub.cfg for the entries