09-19-2012
"The -v option is useless with df."
-v option for displaying the used blocks which by default don't show up in df.
-------------------------
Lastly,Will it be correct to say from the following , that :
# du -xk / | tail -1
38195512
# df -k -v
Mount Dir Filesystem blocks used free %used
/ /dev/root 871678974 64231830 807447144 8%
/stand /dev/boot 40959 6413 34546 16%
For my / partition
total partition space (df)= 871678974 blocks = 871.6 gb (approx.)
present used space by whole partition (df -v) = 64231830 blocks= 64.2 gb (approx.)
space usage by files and directories (du) = 38195512 blocks = 38.1 gb (approx.)
space used by filesystem entities/data = 64.2 - 38.1 gb = 26.1 gb (approx.)
-------------
regards,
Dexter
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LEARN ABOUT CENTOS
approx-gc
APPROX-GC(8) System Manager's Manual APPROX-GC(8)
NAME
approx-gc - garbage-collect the cache of Debian archive files
SYNOPSIS
approx-gc [OPTION]...
DESCRIPTION
approx-gc scans the cache created by approx(8) and finds files that are corrupted or no longer needed. With no options specified, these
files are listed on standard output and removed from the cache.
A corrupted file is one whose size or checksum does not match the value specified in the Packages or Sources file.
An unneeded file is one that is not referenced from any distribution's Packages or Sources file.
approx-gc may take several minutes to finish.
OPTIONS
-c file, --config file
Specify an additional configuration file. May be used multiple times.
-f, --fast
Don't perform checksum validation.
-k, --keep, -s, --simulate
Don't remove files from the cache.
-q, --quiet
Don't print file names.
-v, --verbose
Print the reason for removal of each file.
EXAMPLES
To remove all unneeded or corrupted files from the cache:
approx-gc --quiet
This is run as a weekly cron(8) job.
To list the files that would be removed from the cache, without actually doing so:
approx-gc --keep
FILES
/etc/approx/approx.conf
Configuration file for approx and related programs.
/var/cache/approx
Default cache directory for archive files.
SEE ALSO
approx.conf(5), approx(8), cron(8)
AUTHOR
Eric Cooper <ecc@cmu.edu>
May 2011 APPROX-GC(8)