du — Summarize Disk Usage
Synopsis
/usr/ucb/du
/usr/ucb/du [-a][-s][filename] Description
The /usr/ucb/du command, provided for BSD compatibility, displays the number of kilobytes contained in all files and, recursively, directories within each specified directory or file name. If you do not specify filename , then the current directory (.) is used.
A file that has multiple links is counted only once.
Entries are generated only for each directory in the absence of options. Unless you use the -a option, filename arguments that are not directory names are ignored.
Note
If there are too many distinct linked files, du counts the excess files more than once.
Options
| -a | Generate an entry for each file. |
| -s | Display only the grand total for each ... |
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