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If you have lots of directories and want to know which one is heavier (has more MB of data) just use du (disk usage)



Imagine that you need to delete or move one of those directories because you are short of disk space. One solution would be a find + ls + xargs combo and then all the results in Excel, for example. But this is much simpler

cd dir_A

du -sh *

This will show you how much space each directory uses

Alternatively, you may want to know only the directories starting with A. Then you could use this

cd dir_A

du -sh A*