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I can't resize /dev/sda2 in Gparted.

Gparted

edwinksl
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1 Answers1

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This is because gparted cannot resize mounted partitions, and the partition you are trying to resize is Ubuntu's root partition. You will have to boot from a Live CD/USB and resize your partition from there. There are many guides for creating a live CD/USB around, such as this one (for creating a live USB from Ubuntu) and this one (for creating a live USB from Windows).