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What is the available space on my disk, exactly
June 1, 2020
September 14, 2023
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QDirStat appears to be only showing the size of files you own. For example
/boot shows as zero bytes but in reality it would have to have something in it:
$ du /boot -s -h du: cannot read directory '/boot/efi': Permission denied 1.2G /boot $ sudo du /boot -s -h 1.3G /boot
Another important consideration is some utilities list the size of the bytes in a file while others list the space a file occupies which is number of bytes rounded up to the block size which is generally 4,096 bytes or 4K.