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du(1B)

display the number of disk blocks used per directory or file

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

Also by this name: du(1), General commands · du(1M), System administration commands

NAME

du - display the number of disk blocks used per directory or file

SYNOPSIS

/usr/ucb/du [ -F ufs ] /usr/ucb/du [ -F ufs ] [ -a ] [ -s  ]
[ filename ]

DESCRIPTION

du gives the number of kilobytes contained in all files and, recursively, directories within each specified directory or file filename. If filename is missing, `.' (the current directory) is used. A file which has multiple links to it is only counted once.

OPTIONS

-a Generate an entry for each file.

-s Only display the grand total for each of the specified filenames. Entries are generated only for each directory in the absence of options.

EXAMPLE

Here is an example of using du in a directory.  We used  the
pwd(1)  command  to  identify the directory, then used du to
show the usage of all the subdirectories in that  directory.
The  grand  total for the directory is the last entry in the
display:
     % pwd
     /usr/ralph/misc
     % du
     5    ./jokes
     33   ./squash
     44   ./tech.papers/lpr.document
     217  ./tech.papers/new.manager
     401  ./tech.papers
     144  ./memos
     80   ./letters
     388  ./window
     93   ./messages
     15   ./useful.news
     1211 .
     %

NOTES

Filename arguments that are not directory names are ignored, unless you use -a. If there are too many distinct linked files, du will count the excess files more than once.