#Para instalar o grub 
#ex.: chroot /mnt/arch 
cd /mnt/arch 
# or where you are preparing the chroot dir
mount --rbind /proc /mnt/proc/
mount --rbind /sys /mnt/sys/
mount --rbind /dev /mnt/dev/
mount --rbind /dev/pts /mnt//dev/pts
#
chroot /mnt/arch 
#
grub-install /dev/sda --force

or

dpkg-reconfigure grub-pc

or for efi

dpkg-reconfigure grub-efi-amd64
#-signed

How to set the RESUME variable

The swap UUID needs to be added to the /etc/initramfs-tools/conf.d/resume file.

The following command can show what your swap UUID is:

blkid | awk -F\" '/swap/ {print $2}'
e
You can run the following to set that in the RESUME file (it will be created if it doesn't exist in that folder ):

printf "RESUME=UUID=$(blkid | awk -F\" '/swap/ {print $2}')\n" | sudo tee /etc/initramfs-tools/conf.d/resume

Then run the following to update the kernels on the system:

sudo update-initramfs -u -k all

Reboot the system so the changes can take affect.


GRUB_DISABLE_OS_PROBER=false to /etc/default/grub and run sudo update-grub. 

The procedure is as follows:

Backup the system.
Update existing packages and reboot the Debian 11 system.
Edit the file 
/etc/apt/sources.list 
using a text editor and replace each instance of 
bullseye with 
bookworm. 
Next find the update line, replace keyword 
bullseye-updates with 
bookworm-updates. 
Finally, search the security line, replace keyword 
bullseye-security with 
bookworm-security.
Update the packages index on Debian Linux, run:
sudo apt update
Prepare for the operating system minimal system upgrade, run:
sudo apt upgrade --without-new-pkgs
Finally, update Debian 11 to Debian 12 Bookworm by running:
sudo apt full-upgrade
Reboot the Linux system so that you can boot into Debian 12 Bookworm