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du(1) [bsd man page]

DU(1)							      General Commands Manual							     DU(1)

NAME
du - summarize disk usage SYNOPSIS
du [ -s ] [ -a ] [ name ... ] DESCRIPTION
Du gives the number of kilobytes contained in all files and, recursively, directories within each specified directory or file name. If name is missing, `.' is used. The argument -s causes only the grand total to be given. The argument -a causes an entry to be generated for each file. Absence of either causes an entry to be generated for each directory only. A file which has two links to it is only counted once. SEE ALSO
df(1), quot(8) BUGS
Non-directories given as arguments (not under -a option) are not listed. If there are too many distinct linked files, du counts the excess files multiply. 7th Edition April 29, 1985 DU(1)

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DU(1)							    BSD General Commands Manual 						     DU(1)

NAME
du -- display disk usage statistics SYNOPSIS
du [-Aclnx] [-H | -L | -P] [-g | -h | -k | -m] [-a | -s | -d depth] [-B blocksize] [-I mask] [-t threshold] [file ...] DESCRIPTION
The du utility displays the file system block usage for each file argument and for each directory in the file hierarchy rooted in each direc- tory argument. If no file is specified, the block usage of the hierarchy rooted in the current directory is displayed. The options are as follows: -A Display the apparent size instead of the disk usage. This can be helpful when operating on compressed volumes or sparse files. -B blocksize Calculate block counts in blocksize byte blocks. This is different from the -h, -k, -m and -g options or setting BLOCKSIZE and gives an estimate of how much space the examined file hierarchy would require on a filesystem with the given blocksize. Unless in -A mode, blocksize is rounded up to the next multiple of 512. -H Symbolic links on the command line are followed, symbolic links in file hierarchies are not followed. -I mask Ignore files and directories matching the specified mask. -L Symbolic links on the command line and in file hierarchies are followed. -P No symbolic links are followed. This is the default. -a Display an entry for each file in a file hierarchy. -c Display a grand total. -d depth Display an entry for all files and directories depth directories deep. -g Display block counts in 1073741824-byte (1 GiB) blocks. -h ``Human-readable'' output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte. -k Display block counts in 1024-byte (1 kiB) blocks. -l If a file has multiple hard links, count its size multiple times. The default behavior of du is to count files with multiple hard links only once. When the -l option is specified, the hard link checks are disabled, and these files are counted (and displayed) as many times as they are found. -m Display block counts in 1048576-byte (1 MiB) blocks. -n Ignore files and directories with user ``nodump'' flag (UF_NODUMP) set. -r Generate messages about directories that cannot be read, files that cannot be opened, and so on. This is the default case. This option exists solely for conformance with X/Open Portability Guide Issue 4 (``XPG4''). -s Display an entry for each specified file. (Equivalent to -d 0) -t threshold Display only entries for which size exceeds threshold. If threshold is negative, display only entries for which size is less than the absolute value of threshold. -x File system mount points are not traversed. The du utility counts the storage used by symbolic links and not the files they reference unless the -H or -L option is specified. If either the -H or -L option is specified, storage used by any symbolic links which are followed is not counted (or displayed). The -H, -L and -P options override each other and the command's actions are determined by the last one specified. The -h, -k and -m options all override each other; the last one specified determines the block counts used. ENVIRONMENT
BLOCKSIZE If the environment variable BLOCKSIZE is set, and the -h, -k or -m options are not specified, the block counts will be displayed in units of that block size. If BLOCKSIZE is not set, and the -h, -k or -m options are not specified, the block counts will be displayed in 512-byte blocks. EXAMPLES
Show disk usage for all files in the current directory. Output is in human-readable form: # du -ah Summarize disk usage in the current directory: # du -hs Summarize disk usage for a specific directory: # du -hs /home Show name and size of all C files in a specific directory. Also display a grand total at the end: # du -ch /usr/src/sys/kern/*.c SEE ALSO
df(1), chflags(2), fts(3), symlink(7), quot(8) HISTORY
A du command appeared in Version 1 AT&T UNIX. BSD
November 4, 2012 BSD
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