du(C) 19 June 1992 du(C) Name du - summarize disk usage Syntax du [ -afrsu ] [ names ] Description The du command gives the number of blocks contained in all files and directories recursively within each directory and file specified by the names argument. The block count includes the indirect blocks of the file. If names is missing, the current directory is used. The -s option causes only the grand total (for each of the specified names) to be given. The -a option causes an entry to be generated for each file. Absence of either causes an entry to be generated for each directory only. The -f option causes du to display the usage of files in the current file system only. Directories containing mounted file systems will be ignored. The -u option causes du to ignore files that have more than one link. du is normally silent about directories that cannot be read, files that cannot be opened, and so on. The -r option will cause du to generate messages in such instances. A file with two or more links is only counted once. Symbolic links are not followed, but the disk space used to hold the actual symbolic link is counted. Notes If the -a option is not used, non-directories given as arguments are not listed. Files with holes in them will get an incorrect block count. This utility reports sizes in 512 byte blocks. du interprets 1 block from a 1024 byte block system as 2 of its own 512 byte blocks. Standards conformance du is conformant with: AT&T SVID Issue 2; and X/Open Portability Guide, Issue 3, 1989.