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I want to shrink a Linux partition to make room for a Windows 7 installation coming up, but GParted (running within Linux) will not allow me to shrink the mounted /dev/sda2 partition.

Is there any way around this, or must I boot into GParted from a USB drive?

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up vote 2 down vote accepted

You must boot from a USB drive or a Live CD so that the partition isn't being used. You can get a bootable GParted Live CD from

Once you have the ISO, you can use Unetbootin to make a bootable USB drive form the ISO.

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