TEXT   91

df.txt

Guest on 1st August 2021 05:56:09 PM

  1. NAME
  2.        df - summarize free disk space
  3.  
  4.  
  5.  
  6. SYNOPSIS
  7.        df  [-aikPv]  [-t  fstype]  [-x fstype] [--all] [--inodes]
  8.        [--type=fstype]   [--exclude-type=fstype]    [--kilobytes]
  9.        [--portability] [--print-type] [--help] [--version] [file-
  10.        name...]
  11.  
  12.  
  13.  
  14. DESCRIPTION
  15.        This manual page documents the GNU version of df.  df dis-
  16.        plays the amount of disk space available on the filesystem
  17.        containing each file name argument.  If no  file  name  is
  18.        given,  the  space  available  on  all  currently  mounted
  19.        filesystems is shown.  Disk space is shown in 1K blocks by
  20.        default,  unless  the environment variable POSIXLY_CORRECT
  21.        is set, in which case 512-byte blocks are used.
  22.  
  23.        If an argument is the absolute file name of a disk  device
  24.        node  containing  a mounted filesystem, df shows the space
  25.        available on that filesystem rather than on the filesystem
  26.        containing  the  device  node  (which  is  always the root
  27.        filesystem).  This version of df  cannot  show  the  space
  28.        available  on unmounted filesystems, because on most kinds
  29.        of systems doing so  requires  very  nonportable  intimate
  30.        knowledge of filesystem structures.
  31.  
  32.    OPTIONS
  33.        -a, --all
  34.               Include  in  the  listing  filesystems  that have 0
  35.               blocks,  which  are  omitted  by   default.    Such
  36.               filesystems  are  typically special-purpose pseudo-
  37.               filesystems, such as automounter entries.  On  some
  38.               systems, filesystems of type ``ignore'' or ``auto''
  39.               are also omitted by default  and  included  in  the
  40.               listing by this option.
  41.  
  42.        -i, --inodes
  43.               List  inode  usage  information  instead  of  block
  44.               usage.  An inode (short for ``index  node'')  is  a
  45.               special  kind  of disk block that contains informa-
  46.               tion about a file, such as its owner,  permissions,
  47.               timestamps, and location on the disk.
  48.  
  49.        -k, --kilobytes
  50.               Print  sizes  in  1K  blocks  instead  of  512-byte
  51.               blocks.  This overrides  the  environment  variable
  52.               POSIXLY_CORRECT.
  53.  
  54.        -P, --portability
  55.               Use  the  POSIX  output  format.   This is like the
  56.               default format except that  the  information  about
  57.               each  filesystem  is  always printed on exactly one
  58.               line; a mount device is never  put  on  a  line  by
  59.               itself.   This  means that if the mount device name
  60.               is more than 20 characters long (as for  some  net-
  61.               work mounts), the columns are misaligned.
  62.  
  63.        -T, --print-type
  64.               Print  a type string for each filesystem.  Any such
  65.               printed filesystem type name  may  be  used  as  an
  66.               argument    to    either    of   the   --type=   or
  67.               --exclude-type= options.
  68.  
  69.        -t, --type=fstype
  70.               Limit the listing to filesystems  of  type  fstype.
  71.               Multiple  filesystem  types  can be shown by giving
  72.               multiple -t options.  By  default,  all  filesystem
  73.               types are listed.
  74.  
  75.        -x, --exclude-type=fstype
  76.               Limit  the  listing  to  filesystems  not  of  type
  77.               fstype.  Multiple filesystem types  can  be  elimi-
  78.               nated  by  giving multiple -x options.  By default,
  79.               all filesystem types are listed.
  80.  
  81.        -v     Ignored; for compatibility with System  V  versions
  82.               of df.
  83.  
  84.        --help Print  a  usage message on standard output and exit
  85.               successfully.
  86.  
  87.        --version
  88.               Print version information on standard  output  then
  89.               exit successfully.

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