du—Summarize disk usage

du [–abcklsxDLS] [—all] [—total] [—count-links] [—summarize] [—bytes] [—kilobytes] [—one-file-system] [—separate-dirs] [—dereference] [—dereference-args] [—help] [—-version] [filename…]

This manual page documents the GNU version of du. du displays the amount of disk space used by each argument and for each subdirectory of directory arguments. The space is measured in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.


Options Description
–a, —all Display counts for all files, not just directories.
–b, —bytes Print sizes in bytes.
–c, —total Write a grand total of all of the arguments after all arguments have been processed. This can be used to find out the disk usage of a directory, with some files excluded.
–k, —kilobytes Print sizes in kilobytes. This overrides the environment variable POSIXLY_CORRECT.
–l, —count-links Count the size of all files, even if they have appeared already in another hard link.
–s, —summarize Display only a total for each argument.
–x, —one-file-system Skip directories that are on different filesystems from the one that the argument being processed is on.
–D, —dereference-args Dereference symbolic links that are command-line arguments. Does not affect other symbolic links. This is helpful for finding out the disk usage of directories like /usr/tmp where they are symbolic links.
–L, —dereference Dereference symbolic links (show the disk space used by the file or directory that the link points to instead of the space used by the link).
–S, —separate-dirs Count the size of each directory separately, not including the sizes of subdirectories.
—help Print a usage message on standard output and exit successfully.
—version Print version information on standard output, then exit successfully.

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