Linux Command - du

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du - list the sizes of a folder and any subfolders

Syntax

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du [OPTIONS] [FILE]

Options

Option Description
-a Show file sizes too
-L Follow all symlinks
-H Follow symlinks on command line
-d N Limit output to directories (and files with -a) of depth < N
-c Show grand total
-l Count sizes many times if hard linked
-s Display only a total for each argument
-x Skip directories on different filesystems
-h Sizes in human readable format (e.g., 1K 243M 2G)
-m Sizes in megabytes
-k Sizes in kilobytes (default)

Examples

List sizes of a folder and any subfolders

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du -h /usr/local

sample ouput

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du -h /usr/local
44.0K	/usr/local/bin
4.0K	/usr/local/share
4.0K	/usr/local/lib
56.0K	/usr/local

List sizes of all contents in a folder

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du -ah /usr/local

sample output

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40.0K	/usr/local/bin/envsubst
44.0K	/usr/local/bin
4.0K	/usr/local/share
4.0K	/usr/local/lib
56.0K	/usr/local

List sizes of a folder and any subfolders(deep 1)

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du -h -d 1  /usr

sample output

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360.0K	/usr/bin
3.3M	/usr/share
6.2M	/usr/lib
2.6M	/usr/sbin
56.0K	/usr/local
4.0K	/usr/src
12.6M	/usr

list sizes of .png files in current folder

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du -ch *.png

Reference