du(1) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
DU(1)                   NetBSD General Commands Manual                   DU(1)


NAME
du -- display disk usage statistics
SYNOPSIS
du [-H | -L | -P] [-a | -d depth | -s] [-cghikmnrx] [file ...]
DESCRIPTION
The du utility displays the file system usage for each file argument and for each directory in the file hierarchy rooted in each directory argu- ment. If no file is specified, the block usage of the hierarchy rooted in the current directory is displayed. The options are as follows: -H Symbolic links on the command line are followed. (Symbolic links encountered in the tree traversal are not followed.) -L All symbolic links are followed. -P No symbolic links are followed. -a Display an entry for each file in the file hierarchy. -c Display the grand total after all the arguments have been pro- cessed. -d Display an entry files and directories depth directories deep. -g If the -g flag is specified, the number displayed is the number of gigabyte (1024*1024*1024 bytes) blocks. -h If the -h flag is specified, the numbers will be displayed in "human-readable" format. Use unit suffixes: B (Byte), K (Kilo- byte), M (Megabyte), G (Gigabyte), T (Terabyte) and P (Petabyte). -i Output inode usage instead of blocks. All "human-readable" options are ignored. -k By default, du displays the number of blocks as returned by the stat(2) system call, i.e. 512-byte blocks. If the -k flag is specified, the number displayed is the number of kilobyte (1024 bytes) blocks. Partial numbers of blocks are rounded up. -m If the -m flag is specified, the number displayed is the number of megabyte (1024*1024 bytes) blocks. -n Ignore files and directories with user "nodump" flag (UF_NODUMP) set. -r Generate warning messages about directories that cannot be read. This is the default behaviour. -s Display only the grand total for the specified files. -x Filesystem mount points are not traversed. du counts the storage used by symbolic links and not the files they ref- erence unless the -H or -L option is specified. If either the -H or -L options are specified, storage used by any symbolic links which are fol- lowed 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 spec- ified. Files having multiple hard links are counted (and displayed) a single time per du execution.
ENVIRONMENT
BLOCKSIZE If the environment variable BLOCKSIZE is set, and the -g, -h, -k, and -m options are not specified, the block counts will be displayed in units of that size block.
EXIT STATUS
The du utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
df(1), chflags(2), fts(3), getbsize(3), symlink(7), quot(8)
HISTORY
A du command appeared in Version 1 AT&T UNIX. NetBSD 9.99 September 1, 2019 NetBSD 9.99
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