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When investigating what eats up all that disc space the dot-directories like like .thunderbirdcache, .local and , .thunderbird and the like usually evade a du call.
Here's how to get those too, and get sort the output sorted by eaten space:
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du -smc .[!.]* * |sort -n |
Bonus hint: sort understands -h too:
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du -smc .[!.]* * |sort -h |
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