du

Disk Usage - report the amount of disk space used by the specified files and for each subdirectory.

Syntax
      du [options]... [file]...

With no arguments, `du' reports the disk space for the current directory. Normally the disk space is printed in units of 1024 bytes, but this can be overridden

OPTIONS

-a
--all
     Show counts for all files, not just directories.

-b
--bytes
     Print sizes in bytes, overriding the default block size (*note
     Block size::).

-c
--total
     Print a grand total of all arguments after all arguments have been
     processed.  This can be used to find out the total disk usage of a
     given set of files or directories.

-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, such as `/usr/tmp', which are often
     symbolic links.

-h
--human-readable
     Append a size letter such as `M' for megabytes to each size.
     Powers of 1024 are used, not 1000; `M' stands for 1,048,576 bytes.
     Use the `-H' or `--si' option if you prefer powers of 1000.

-H
--si
     Append a size letter such as `M' for megabytes to each size.  (SI
     is the International System of Units, which defines these letters
     as prefixes.)  Powers of 1000 are used, not 1024; `M' stands for
     1,000,000 bytes.  Use the `-h' or `--human-readable' option if you
     prefer powers of 1024.

-k
--kilobytes
     Print sizes in 1024-byte blocks, overriding the default block size
     (*note Block size::).

-l
--count-links
     Count the size of all files, even if they have appeared already
     (as a hard link).

-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).

--max-depth=DEPTH
     Show the total for each directory (and file if -all) that is at
     most MAX_DEPTH levels down from the root of the hierarchy.  The
     root is at level 0, so `du --max-depth=0' is equivalent to `du -s'.

-m
--megabytes
     Print sizes in megabyte (that is, 1,048,576-byte) blocks.

-s
--summarize
     Display only a total for each argument.

-S
--separate-dirs
     Report the size of each directory separately, not including the
     sizes of subdirectories.

-x
--one-file-system
     Skip directories that are on different filesystems from the one
     that the argument being processed is on.

--exclude=PAT
     When recursing, skip subdirectories or files matching PAT.  For
     example, `du --exclude='*.o'' excludes files whose names end in
     `.o'.

-X FILE
--exclude-from=FILE
     Like `--exclude', except take the patterns to exclude from FILE,
     one per line.  If FILE is `-', take the patterns from standard
     input.

On BSD systems, `du' reports sizes that are half the correct values
for files that are NFS-mounted from HP-UX systems.  On HP-UX systems,
it reports sizes that are twice the correct values for files that are
NFS-mounted from BSD systems.  This is due to a flaw in HP-UX; it also
affects the HP-UX `du' program.

Example

List the total files sizes for everything 1 directory (or less) below the currrent directory ( . )

[simon@testserver]$ du -hc --max-depth=1 .
400M ./data1
1.0G ./data2
1.3G .
1.3G total

"Never go to a doctor whose office plants have died" ~ Erma Bombeck

Related:

ls - List information about FILEs
Equivalent Windows command: DIRUSE - resource kit utility to show size of multiple subfolders.


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