40_custom example five additional OS in the GRUB menu

[Axellarator]

Simple example for a modified GRUB menu. In the moment os-prober can't deliver all possible OS in your system due to security restrictions. This is a possible way to get around and not in harms way. I use /@/boot/vmlinuzand /@/boot/initrd.img as links, because if a kernel update is needed, everything points correctly to the latest (updated) version.

---

\#! /usr/bin/sh exec tail -n +3 $0 \# This file provides an easy way to add custom menu entries. Simply type the \# menu entries you want to add after this comment. Be careful not to change \# the 'exec tail' line above.'''

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

menuentry "LM 21 Mate" --class linuxmint --class gnu-linux --class gnu --class os {
# DEVICE="/dev/nvme0n1p5"
UUID_BTRFS=714517ab-c90d-42ca-a492-245053ae57fd
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod part_gpt
insmod btrfs
search --no-floppy --fs-uuid --set=root ${UUID_BTRFS}
linux /@/boot/vmlinuz root=UUID=${UUID_BTRFS} ro rootflags=subvol=@ ${GRUB_CMDLINE_LINUX } ${GRUB_CMDLINE_LINUX_DEFAULT}
initrd /@/boot/initrd.img
}
menuentry "LM 21 Cinnamon" --class linuxmint --class gnu-linux --class gnu --class os {
# DEVICE="/dev/nvme0n1p6"
UUID_BTRFS=6bf64ce2-c8a5-4dda-b8f8-491615008b43
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod part_gpt
insmod btrfs
search --no-floppy --fs-uuid --set=root ${UUID_BTRFS}
linux /@/boot/vmlinuz root=UUID=${UUID_BTRFS} ro rootflags=subvol=@ ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}
initrd /@/boot/initrd.img
}
menuentry "LMDE 5 Elsie" --class linuxmint --class gnu-linux --class gnu --class os {
# DEVICE="/dev/nvme0n1p7"
UUID_BTRFS=35c3a7e0-1aa7-4a70-9e87-18d2a0acce4b
load_video
insmod gzio
insmod part_msdos
insmod part_gpt
insmod btrfs
search --no-floppy --fs-uuid --set=root ${UUID_BTRFS}
linux /@/vmlinuz root=UUID=${UUID_BTRFS} ro rootflags=subvol=@ ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}
initrd /@/initrd.img
}
menuentry 'LM 20.3 Mate' --class linuxmint --class gnu-linux --class gnu --class os {
# DEVICE="/dev/nvme0n1p8"
UUID_BTRFS=138cabd1-b0de-4b57-a9f4-338970fe7df0
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod part_gpt
insmod btrfs
search --no-floppy --fs-uuid --set=root ${UUID_BTRFS}
linux /@/boot/vmlinuz root=UUID=${UUID_BTRFS} ro rootflags=subvol=@ ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}
initrd /@/boot/initrd.img
}
menuentry "LM 20.3 Zimt" --class linuxmint --class gnu-linux --class gnu --class os {
# DEVICE="/dev/nvme0n1p9"
UUID_BTRFS=2f5717f8-09e6-44b1-a836-a9eb8238efc4
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod part_gpt
insmod btrfs
search --no-floppy --fs-uuid --set=root ${UUID_BTRFS}
linux /@/boot/vmlinuz root=UUID=${UUID_BTRFS} ro rootflags=subvol=@ ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}
initrd /@/boot/initrd.img
}`