מאגר מידע

Setup: Proxmox 7; Disk model: QEMU HARDDISK; Ubuntu 20.04.3 LTS

Expand the QEMU HARDDISK file via Proxmox as per Proxmox VM disk resize steps (VM->Hardware->Hard Disk->Disk Action->Resize) and then inside the VM:

$ sudo fdisk -l

See which partition is the current Ubuntu setup - should be obvious based on size (in my case was sda2)

$ sudo growpart /dev/sda 2

# NB: space between `partition` (/dev/sda) and `id` (2)!

Resize:

$ sudo resize2fs /dev/sda2

# NB: *no space* between partition and id!