How to Change Your VPS Partition Layout After OS Installation

A fresh VPS image usually ships with a single root partition that fills the disk. That works until you need a separate /var for database I/O, or you upgrade the plan and want to claim the new space. This article walks through that change end-to-end, with rollback advice for every step.

Before you start

• SSH or web console access to the VPS, plus a working rescue mode for safety.
• Root or sudo privileges.
• A verified, fresh backup — not just a scheduled one.
• A 15-minute maintenance window with low traffic.

1Inspect your current layout

Before changing anything, photograph the current state. lsblk shows the block-device tree, df -h shows mounted filesystems, and parted -l reveals partition tables across every disk.

# See the block-device tree, sizes, and mount points
lsblk -f

# See used vs available space on every mounted filesystem
df -hT

# Show every disk's partition table in detail
sudo parted -l

Save this output — you'll compare against it after the resize.

2Boot into a rescue session (when needed)

You can grow the root partition forward into adjacent free space on a running system. Anything more invasive — shrinking, moving, or repartitioning the root disk — requires booting from a rescue image so the disk isn't in use.

ssh [email protected]
lsblk

# Check filesystem health before resizing (ext4 example)
sudo e2fsck -f /dev/vda1

3Resize the partition with parted or growpart

Two practical tools: growpart for a quick extension into free space, or parted for full control. Both modify the partition table only — the filesystem is resized in step 4.

Option A — growpart (recommended for simple extensions):

# Install if missing
sudo apt install cloud-guest-utils      # Debian/Ubuntu
sudo dnf install cloud-utils-growpart   # AlmaLinux/Rocky

# Grow partition 1 on disk /dev/vda into adjacent free space
sudo growpart /dev/vda 1

Option B — parted (full control, including shrinking):

sudo parted /dev/vda
(parted) print free
(parted) resizepart 1 100%
# Or to an explicit size:
(parted) resizepart 1 80GB
(parted) print
(parted) quit

4Resize the filesystem inside the partition

The partition is bigger, but the filesystem doesn't know yet. Grow it with the tool that matches your filesystem.

ext4:

# Grow ext4 to fill the resized partition
sudo resize2fs /dev/vda1

# Or resize to an explicit size (useful when shrinking)
sudo resize2fs /dev/vda1 40G

XFS (online, only grows):

# XFS expands by mount point, while online
sudo xfs_growfs /

LVM (one command does partition + LV + FS):

# Tell LVM the physical volume is now larger
sudo pvresize /dev/vda1

# Extend the logical volume to 100% of free space and resize the FS
sudo lvextend -r -l +100%FREE /dev/mapper/vg0-root

5Verify and reboot

Confirm the new layout sticks, then boot back into the normal OS.

lsblk -f
df -hT
sudo parted -l

# Exit rescue and reboot into the OS
sync; reboot

Frequently asked questions