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1st chunk of `du.man`
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DU(1)                                                                                                     User Commands                                                                                                    DU(1)

NAME
       du - estimate file space usage

SYNOPSIS
       du [OPTION]... [FILE]...
       du [OPTION]... ‐‐files0‐from=F

DESCRIPTION
       Summarize device usage of the set of FILEs, recursively for directories.

       Mandatory arguments to long options are mandatory for short options too.

       -0, --null
              end each output line with NUL, not newline

       -a, --all
              write counts for all files, not just directories

       --apparent-size
              print apparent sizes rather than device usage; although the apparent size is usually smaller, it may be larger due to holes in (’sparse’) files, internal fragmentation, indirect blocks, and the like

       -B, --block-size=SIZE
              scale sizes by SIZE before printing them; e.g., ’-BM’ prints sizes in units of 1,048,576 bytes; see SIZE format below

       -b, --bytes
              equivalent to ’--apparent-size --block-size=1’

       -c, --total
              produce a grand total

       -D, --dereference-args
              dereference only symlinks that are listed on the command line

       -d, --max-depth=N
              print the total for a directory (or file, with --all) only if it is N or fewer levels below the command line argument;  --max-depth=0 is the same as --summarize

       --files0-from=F
              summarize device usage of the NUL-terminated file names specified in file F; if F is -, then read names from standard input

       -H     equivalent to --dereference-args (-D)

       -h, --human-readable
              print sizes in human readable format (e.g., 1K 234M 2G)

       --inodes
              list inode usage information instead of block usage

       -k     like --block-size=1K

       -L, --dereference
              dereference all symbolic links

       -l, --count-links
              count sizes many times if hard linked

       -m     like --block-size=1M

       -P, --no-dereference
              don’t follow any symbolic links (this is the default)

       -S, --separate-dirs
              for directories do not include size of subdirectories

       --si   like -h, but use powers of 1000 not 1024

       -s, --summarize
              display only a total for each argument

       -t, --threshold=SIZE
              exclude entries smaller than SIZE if positive, or entries

Title: du - estimate file space usage
Summary
The du command estimates file space usage. It summarizes the disk usage of files and directories, recursively for directories. Options include specifying the block size, displaying sizes in human-readable format, limiting the depth of recursion, and controlling how symbolic links are handled.