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1 | DU(1) BSD Reference Manual DU(1) |
| 2 | ||
| 3 | N\bNA\bAM\bME\bE | |
| 4 | d\bdu\bu - display disk usage statistics | |
| 5 | ||
| 6 | S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS | |
| 7 | d\bdu\bu [-\b-a\ba | -\b-s\bs] [-\b-H\bHh\bhx\bx] [_\bf_\bi_\bl_\be _\b._\b._\b.] | |
| 8 | ||
| 9 | D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN | |
| 10 | The d\bdu\bu utility displays the file system block usage for each file argu- | |
| 11 | ment and for each directory in the file hierarchy rooted in each directo- | |
| 12 | ry argument. If no file is specified, the block usage of the hierarchy | |
| 13 | rooted in the current directory is displayed. The number of blocks are | |
| 14 | in the same units as that returned by the stat(2) system call, i.e. | |
| 15 | 512-byte blocks. Partial numbers of blocks are rounded up. | |
| 16 | ||
| 17 | The options are as follows: | |
| 18 | ||
| 19 | -\b-a\ba Display an entry for each file in the file hierarchy. | |
| 20 | ||
| 21 | -\b-s\bs Display only the grand total for the specified files. | |
| 22 | ||
| 23 | -\b-H\bH When encountering a symbolic link on the command line, follow it. | |
| 24 | All other symbolic links encountered in the traversal are not | |
| 25 | followed. | |
| 26 | ||
| 27 | -\b-h\bh When encountering a symbolic link anywhere in the traversal, fol- | |
| 28 | low it. | |
| 29 | ||
| 30 | -\b-x\bx Filesystem mount points are not traversed. | |
| 31 | ||
| 32 | D\bDu\bu references symbolic links as the links themselves unless the -\b-H\bH or -\b-h\bh | |
| 33 | flags are specified, in which case behavior is as detailed above. | |
| 34 | ||
| 35 | Files having multiple hard links are counted (and displayed) a single | |
| 36 | time per d\bdu\bu execution. | |
| 37 | ||
| 38 | E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bTA\bAL\bL V\bVA\bAR\bRI\bIA\bAB\bBL\bLE\bES\bS | |
| 39 | BLOCKSIZE If the environmental variable BLOCKSIZE is set, the block | |
| 40 | counts will be displayed in units of that size block. | |
| 41 | ||
| 42 | S\bSE\bEE\bE A\bAL\bLS\bSO\bO | |
| 43 | df(1), fts(3), symlink(7), quot(8) | |
| 44 | ||
| 45 | H\bHI\bIS\bST\bTO\bOR\bRY\bY | |
| 46 | A d\bdu\bu command appeared in Version 6 AT&T UNIX. | |
| 47 | ||
| 48 | 4.4BSD June 6, 1993 1 |