Shrink Disk in Linux

Hello
I need to shrink disk in Linux but can’t shrink … How can I solve this problem
I searched and found no solution):

Thank you
2020-12-09_19-23

Start gparted from a live medium. Either from disk or from a USB stick.

There is a live version from gparted at their website.

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You can’t modify a partition you are currently using.

Follow the advice from the first comment.

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thank you so much