growpart

Extend a partition in a disk or disk image to fill available space. More information: https://github.com/canonical/cloud-utils.

• Extend partition n from sdX to fill empty space until end of disk or beginning of next partition:

growpart {{/dev/sdX}} {{n}}

• Show what modifications would be made when growing partition n in a disk image:

growpart {{[-N|--dry-run]}} /{{path/to/disk.img}} {{n}}