Transfer /boot from a separate partition to a main partition

On the test, I installed a clean Ubuntu Server 18.04, during the installation, the system automatically split the disk into one main /dev/sda1, which already had /boot files.
Since I did not have a system with /boot on a separate partition, I transferred it to a separate one and described the process in this article – Transfer /boot from a main partition to a separate partition

Now let’s move the /boot partition to the main /.

Let’s look at the information about the disks:

sudo fdisk -l
df -h

Mount the boot partition in the /mnt/ directory:

sudo mount /dev/sda1 /mnt/

Unmount /boot/:

sudo umount /boot/

We copy the files from the partition with the loader to the main:

sudo cp -p -r /mnt/* /boot
sudo umount /dev/sda1

Let’s comment the line with the boot partition in the /etc/fstab file (in the nano editor for CTRL+X, y/n for saving or canceling the changes):

sudo nano /etc/fstab

Update the loader:

sudo update-grub

We can restart the system and make sure that it starts:

reboot

On this, the transfer of the /boot partition to the main partition is completed.
The partition /dev/ sda1 is not deleted, there is a bootloader.

See also my articles:
Recovering GRUB Linux
Configuring Software RAID1 on a Running Ubuntu System
Transferring a running Ubuntu system to another disk

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