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DU(1V)                                                                  DU(1V)



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

SYNOPSIS
       du [ -s ] [ -a ] [ filename ...  ]

SYSTEM V SYNOPSIS
       /usr/5bin/du [ -s ] [ -a ] [ -r ] [ filename ...  ]

AVAILABILITY
       The  System  V  version  of this command is available with the System V
       software installation option.  Refer  to  for  information  on  how  to
       install optional software.

DESCRIPTION
       du  gives  the  number  of kilobytes contained in all files and, recur-
       sively, 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.

SYSTEM V DESCRIPTION
       The  System  V version of du gives the number of 512-byte blocks rather
       than the number of kilobytes.

OPTIONS
       -s     Only display the grand total for each  of  the  specified  file-
              names.

       -a     Generate an entry for each file.

       Entries  are  generated  only  for  each  directory  in  the absence of
       options.

SYSTEM V OPTIONS
       -r     The System V version of du is normally silent about  directories
              that  cannot  be read, files that cannot be opened, etc.  The -r
              option will cause du to generate messages in such instances.

EXAMPLE
       Here is an example of using du in a directory.  We used the pwd(1) com-
       mand  to  identify the directory, then used du to show the usage of all
       the subdirectories in that directory.  The grand total for  the  direc-
       tory 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 .
              %

SEE ALSO
       df(1V), pwd(1), quot(8)

BUGS
       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.



                               9 September 1987                         DU(1V)