🔍 Step 1 — Check your disk layout
Run:
lsblk
You’ll see something like:
sda 40G├─sda1 1G├─sda2 2G└─sda3 17G ← THIS is the one we grow └─ubuntu--vg-ubuntu--lv ~19G
👉 Remember: sda3 is important
📦 Step 2 — Install required tool
sudo apt update
sudo apt install cloud-guest-utils -y
📏 Step 3 — Expand the partition
sudo growpart /dev/sda 3
👉 If successful, you’ll see something like:
CHANGED: partition=3 start=... size=...
🧱 Step 4 — Resize physical volume (LVM)
sudo pvresize /dev/sda3
📦 Step 5 — Extend logical volume
sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
📂 Step 6 — Resize filesystem
sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
✅ Step 7 — Verify
df -h
👉 You should now see ~40GB total 🎉
🧪 Example result
Before:
/dev/mapper/... 19G
After:
/dev/mapper/... 39G ❌ If something fails
growpart not found
sudo apt install cloud-guest-utils
“NOCHANGE” message
👉 Means partition already full — skip to next step
Wrong disk name?
Check again:
lsblk
Could be:
/dev/vda/dev/sda/dev/nvme0n1
🧠 Quick summary
sudo apt install cloud-guest-utils -y
sudo growpart /dev/sda 3
sudo pvresize /dev/sda3
sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
df -h