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du

"estimate file space usage" - man du

Examples

Summarize low level directory uage

When a partition fills up this is a good place to begin looking. Some flags may not be available, such as sort -h

## -x      --one-file-system
## -d 3    --max-depth=3
## -h      --human-readable
sudo du -x -d 3 -h / | sort -h