Linux: comando “du” e sue opzioni per vedere la dimensione delle directory in byte


Il comando “du” ci permette di vedere di default la dimensione dei file e delle directory in block, se volessimo pertanto avere il dato in un formato più comprensibile  dovremmo utilizzare l’opzione -h ( –human-readable ).

Ad ogni modo il comando da usare per ottenere la dimensione totale della directory da cui state lanciando il comando è:

du -csh .

mentre per avere il risultato in Gb

du -csh --block-size=1G .

dove l’ opzione:

-h sta per human readable

-c produce il totale 

-s produce la summary

Infine, per ottenere  il dettaglio di tutti file contenuti in una directory sarà sufficiente lanciare il comando:

du -h  .

Di seguito per completezza vi lascio la man page di linux del comando “du” :

       du - estimate file space usage

       du [OPTION]... [FILE]...
       du [OPTION]... --files0-from=F

       Summarize disk usage of the set of FILEs, recursively for directo‐

       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

              print  apparent sizes, rather than disk 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

       -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

       -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

              summarize disk usage of the NUL-terminated file names spec‐
              ified in file F; if F is -, then read names  from  standard

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

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

              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
              greater than SIZE if negative

       --time show time of the last  modification  of  any  file  in  the
              directory, or any of its subdirectories

              show  time  as  WORD  instead  of modification time: atime,
              access, use, ctime or status

              show times using STYLE, which can be:  full-iso,  long-iso,
              iso, or +FORMAT; FORMAT is interpreted like in 'date'

       -X, --exclude-from=FILE
              exclude files that match any pattern in FILE

              exclude files that match PATTERN

       -x, --one-file-system
              skip directories on different file systems

       --help display this help and exit

              output version information and exit

       Display  values  are  in  units  of  the first available SIZE from
       --block-size, and  the  DU_BLOCK_SIZE,  BLOCK_SIZE  and  BLOCKSIZE
       environment variables.  Otherwise, units default to 1024 bytes (or
       512 if POSIXLY_CORRECT is set).

       The SIZE argument is an integer and optional unit (example: 10K is
       10*1024).  Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,...
       (powers of 1000).  Binary prefixes can be used, too: KiB=K, MiB=M,
       and so on.

       PATTERN  is  a shell pattern (not a regular expression).  The pat‐
       tern ? matches any one character, whereas  *  matches  any  string
       (composed  of zero, one or multiple characters).  For example, *.o
       will match any files whose names end in .o.  Therefore,  the  com‐

              du --exclude='*.o'

       will skip all files and subdirectories ending in .o (including the
       file .o itself).

       Written by Torbjorn Granlund, David MacKenzie,  Paul  Eggert,  and
       Jim Meyering.

       GNU  coreutils  online  help:  <‐
       Report   any   translation   bugs   to    <https://translationpro‐>

       Copyright  ©  2020 Free Software Foundation, Inc.  License GPLv3+:
       GNU GPL version 3 or later <>.
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

       Full documentation <>
       or available locally via: info '(coreutils) du invocation'

GNU coreutils 8.32              April 2020                          DU(1)


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