Reclaim ‘missing’ space on a Linux partition with tune2fs

If you aren’t storing critical system files on a partition, you can free up a ton of space. This will reduce the ‘reserved’ space on a Linux partition to 0%. I freed up 45Gb of ‘lost’ space on a 900Gb partition using the following command:

tune2fs -m 0 /dev/sda4

Note: DO NOT set the reserved space to 0 on a system partition.

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