df(1)

NAME
     df - report on free disk space

SYNOPSIS
     df [-ikP] [-t type] [file ...]

DESCRIPTION
     Df lists the amount of free space on the currently  mounted  devices  (no
     arguments),  or the devices given as arguments.  If the argument is not a
     device then the device it resides on is listed.

OPTIONS
     Without options, df will give a listing like this:

                 1k-Blocks     free     used    %  FUsed%  Mounted on
     /dev/hd2a        1440      289     1151  80%    33%   /
     /dev/hd2b        1024      997       27   3%     1%   /tmp
     /dev/hd2c      130548    72088    58460  45%    44%   /usr

     The -i option shifts the focus to the files:

                     Files     free     used    %  BUsed%  Mounted on
     /dev/hd2a         480      326      154  33%    80%   /
     /dev/hd2b         352      351        1   1%     3%   /tmp
     /dev/hd2c       16368     9226     7142  44%    45%   /usr

     Option -P makes df use POSIX defined output in 512 byte units:

     Filesystem   512-blocks    Used  Available  Capacity  Mounted on
     /dev/hd2a        2880      2302      578       80%    /
     /dev/hd2b        2048        54     1994        3%    /tmp
     /dev/hd2c      261096    116932   144164       45%    /usr

     With -k 1024 byte units would be used.

     The -t option limits df's output to file systems of the given type.

FILES

     /etc/mtab      List of mounted file systems.

SEE ALSO
     du(1), fstab(5).

BUGS
     Default output should also be in 512 byte units says POSIX.




AUTHOR
     Kees J. Bot (kjb@cs.vu.nl)