du(1) [netbsd man page]
DU(1) BSD General Commands Manual DU(1) NAME
du -- display disk usage statistics SYNOPSIS
du [-H | -L | -P] [-a | -d depth | -s] [-cghkmnrx] [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: -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 processed. -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 (Kilobyte), M (Megabyte), G (Gigabyte), T (Terabyte) and P (Petabyte). -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 speci- fied, 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 reference 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 followed is not counted or displayed. The -H, -L and -P options over- ride each other and the command's actions are determined by the last one specified. 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 dis- played in units of that size block. SEE ALSO
df(1), chflags(2), fts(3), getbsize(3), symlink(7), quot(8) HISTORY
A du command appeared in Version 6 AT&T UNIX. BSD
September 24, 2006 BSD
Check Out this Related Man Page
DF(1) BSD General Commands Manual DF(1) NAME
df -- display free disk space SYNOPSIS
df [-b | -h | -H | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...] DESCRIPTION
The df utility displays statistics about the amount of free disk space on the specified filesystem or on the filesystem of which file is a part. Values are displayed in 512-byte per block counts. If neither a file or a filesystem operand is specified, statistics for all mounted filesystems are displayed (subject to the -t option below). The following options are available: -a Show all mount points, including those that were mounted with the MNT_IGNORE flag. -b Use 512-byte blocks rather than the default. Note that this overrides the BLOCKSIZE specification from the environment. -g Use 1073741824-byte (1-Gbyte) blocks rather than the default. Note that this overrides the BLOCKSIZE specification from the environ- ment. -H "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to three or less using base 10 for sizes. -h "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to three or less using base 2 for sizes. -i Include statistics on the number of free inodes. -k Use 1024-byte (1-Kbyte) blocks rather than the default. Note that this overrides the BLOCKSIZE specification from the environment. -l Only display information about locally-mounted filesystems. -m Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that this overrides the BLOCKSIZE specification from the environ- ment. -n Print out the previously obtained statistics from the filesystems. This option should be used if it is possible that one or more filesystems are in a state such that they will not be able to provide statistics without a long delay. When this option is speci- fied, df will not request new statistics from the filesystems, but will respond with the possibly stale statistics that were previ- ously obtained. -P Use POSIX compliant output of 512-byte blocks rather than the default. Note that this overrides the BLOCKSIZE specification from the environment. -t Only print out statistics for filesystems of the specified types. More than one type may be specified in a comma separated list. The list of filesystem types can be prefixed with ``no'' to specify the filesystem types for which action should not be taken. For example, the df command: df -t nonfs,mfs lists all filesystems except those of type NFS and MFS. The lsvfs(1) command can be used to find out the types of filesystems that are available on the system. ENVIRONMENT
BLOCKSIZE If the environment variable BLOCKSIZE is set, the block counts will be displayed in units of that size block. BUGS
The -n and -t flags are ignored if a file or filesystem is specified. SEE ALSO
lsvfs(1), quota(1), fstatfs(2), getfsstat(2), statfs(2), getmntinfo(3), fstab(5), mount(8), quot(8) HISTORY
A df command appeared in Version 1 AT&T UNIX. BSD
May 8, 1995 BSD