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UNIX for Dummies Questions & Answers
Explanation of "total" field in "ls -l" command output
Post 302413872 by itkamaraj on Sunday 18th of April 2010 01:40:05 AM
04-18-2010
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LEARN ABOUT REDHAT
df
DF(1) FSF DF(1) NAME
df - report filesystem disk space usage SYNOPSIS
df [OPTION]... [FILE]... DESCRIPTION
This manual page documents the GNU version of df. df displays the amount of disk space available on the filesystem containing each file name argument. If no file name is given, the space available on all currently mounted filesystems is shown. Disk space is shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used. If an argument is the absolute file name of a disk device node containing a mounted filesystem, df shows the space available on that filesystem rather than on the filesystem containing the device node (which is always the root filesystem). This version of df cannot show the space available on unmounted filesystems, because on most kinds of systems doing so requires very nonportable intimate knowledge of filesystem structures. OPTIONS
Show information about the filesystem on which each FILE resides, or all filesystems by default. Mandatory arguments to long options are mandatory for short options too. -a, --all include filesystems having 0 blocks -B, --block-size=SIZE use SIZE-byte blocks -h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G) -H, --si likewise, but use powers of 1000 not 1024 -i, --inodes list inode information instead of block usage -k like --block-size=1K -l, --local limit listing to local filesystems --no-sync do not invoke sync before getting usage info (default) -P, --portability use the POSIX output format --sync invoke sync before getting usage info -t, --type=TYPE limit listing to filesystems of type TYPE -T, --print-type print filesystem type -x, --exclude-type=TYPE limit listing to filesystems not of type TYPE -v (ignored) --help display this help and exit --version output version information and exit SIZE may be (or may be an integer optionally followed by) one of following: kB 1000, K 1024, MB 1,000,000, M 1,048,576, and so on for G, T, P, E, Z, Y. AUTHOR
Written by Torbjorn Granlund, David MacKenzie, Larry McVoy, and Paul Eggert. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for df is maintained as a Texinfo manual. If the info and df programs are properly installed at your site, the com- mand info df should give you access to the complete manual. df (coreutils) 4.5.3 February 2003 DF(1)