Resize Ubuntu Partitions in Hyper-V to Use Full Disk

When creating a new virtual machine in Hyper-V with Ubuntu Server with all the default settings, the partition will have 60GB of space instead of 127GB (default size of the virtual hard disk). Maybe there is a setting somewhere that I missed during the setup, but I couldn't find it. The solution is to resize the partition after the installation. This can be done with the following commands:

First, check the partition table to see the current size of the partition:

sudo fdisk -l

Identify the logical volume you want to extend. Then, extend the logical volume to use all the free space:

sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv

Finally, resize the filesystem to match the new size of the logical volume:

sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv

Note that if you resized the size of the virtual hard disk in Hyper-V, you may need to run the following command to ensure that the new size is recognized:

sudo growpart /dev/sda 3 # replace 3 with the partition number you want to resize

Do you have a question or a suggestion about this post? Contact me!