Convert Partition Table GPT to MBR in Ubutnu

Q:  how to convert gpt partation table to mbr ?

Q: Convert GPT to MBR using gdisk 

Step 1: Install gdisk

apt update

apt install gdisk

Step 2: Check disk OS boot from UFI for BIOS

gdisk -l /dev/sdX

Step 3: Convert GPT to MBR

gdisk /dev/sda

Recovery and transformation options (experts only) = Press “r”

Convert GPT into MBR and exit = Press “g”

Print the MBR partition table = Press “p”

Write the MBR partition table to disk and exit = Press “w”

Step 4: Reboot Or partprobe

reboot
or
partprobe

Step 5: Re-install Grub

apt-get purge grub-common

apt-get instal grub-pc

Reboot Your System