# How to resizea Linux (Ubuntu) disk in Proxmox

In proxmox, ensure the VM is off and then select the VM you wish to resize the disk. Click on **Hardware**, locate and select the disk and then on top click on **Disk Action --> Resize**. In the **Resize disk** window enter the size in GB you wish to increase by and click on **Resize disk**. Next, power on the machine, login to the CLI as root and run the following commands:

```
# 1. Identify the disk device
fdisk -l
Disk /dev/sda: 650 GiB, 697932185600 bytes, 1363148800 sectors
Disk model: QEMU HARDDISK   
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 218F2D76-B023-4E53-A9A3-1C99785FF2AF

Device     Start        End    Sectors  Size Type
/dev/sda1   2048       4095       2048    1M BIOS boot
/dev/sda2   4096 1363148766 1363144671  650G Linux filesystem

# 2. Grow the partition to fill the disk  (note the SPACE: "sda 2", not "sda2")
sudo growpart /dev/sda 2

# 3. Grow the ext4 filesystem to fill the partition
sudo resize2fs /dev/sda2

# 4. verify
df -h
Filesystem      Size  Used Avail Use% Mounted on
tmpfs           1.6G  2.7M  1.6G   1% /run
/dev/sda2       639G  129G  482G  22% /
tmpfs           7.9G     0  7.9G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock

```