How to Resize Hard Drive Partitions on Linux with GParted

GParted can shrink or expand a Linux partition. Back up important files and confirm the target disk first. Most partitions must be unmounted; use a live USB for the installed system's root partition. GParted queues edits so you can review them before applying. Its manual documents the resize dialog and pending operations.

The interface illustrations below use example device names, mount points, and sizes.

Before you resize a partition

• Back up important files to a separate disk. Software errors, hardware problems, or power loss can cause data loss.
• Keep a laptop plugged in, close programs using the partition, and do not interrupt an operation.
• Check file-system support in GParted's feature list. LUKS encryption, LVM, and RAID may involve multiple storage layers.

Install GParted and identify the right disk

Install GParted from your distribution's software repository. For example:

On other distributions, install gparted from the official repository. Open it from the applications menu and authenticate if prompted. The GParted download page lists packages and the live image.

Choose the disk from the upper-right selector. Match its capacity, then identify the partition by its path, file system, label, size, and mount point. Device names such as /dev/sda vary by computer, so do not rely on the name alone.

A mount point of / marks the running root file system. Data partitions may be mounted under /media or /run/media. Confirm the capacity and details before editing.

Resize an unmounted data partition

1. Unmount the target. Right-click it and choose Unmount. If that fails, close programs using it or switch to a live session.
2. Set the new size. Right-click the partition, choose Resize/Move, then drag an edge or enter New size (MiB). For example, 10 GiB equals 10,240 MiB. Leave “free space preceding” unchanged to keep the starting boundary in place.

3. To shrink, leave room for stored files and file-system overhead. GParted shows the resulting unallocated area. If the requested size is unavailable, check file-system support and space in use.

4. To expand, unallocated space must be directly beside the partition. Space beyond another partition cannot be used until the layout changes. Moving partitions may take a long time and affect booting, so back up and avoid moving system or recovery partitions unless necessary.

Click Resize/Move to add the change to GParted's pending operations. This only stages the plan; it does not yet write the resize to disk.

Resize the Linux root partition from a live USB

The running Linux root partition is active. Some file systems allow limited online growth, but support varies; shrinking or moving it requires an inactive partition. Boot a live environment for root-partition changes.

Download the GParted Live image and follow its USB instructions. Writing the image can erase the selected USB drive, so verify the device. Boot from the USB and open GParted. The current live image is for 64-bit x86; on another architecture, use a compatible live Linux system with GParted.

Select the internal disk and confirm the installed root partition has no mount point. Then resize it and review the pending operation as above.

Review, apply, and verify

Review the pending list: confirm the device path, old and new sizes, and any planned move. Undo mistakes before continuing. If the plan is correct, click the apply checkmark and confirm. Keep the computer powered while GParted works; large resizes and moves can take time.

After completion, verify the refreshed map. For a system disk, remove the USB and boot Linux; confirm the partition mounts and files are available. If GParted reports an error, save its details before taking further action.

Limits that can change the steps

Support depends on the file system and operation. XFS can grow but cannot shrink in place, so making it smaller requires a migration plan. LUKS, LVM, and RAID layouts need their layers resized consistently. Check GParted's feature matrix and your distribution's documentation first; never proceed without a restorable backup.