Disk Usage

[Christian Briddon]

Hi there,

What is is the best way to determine how much disk space is used (in kb or mb, not blocks) in a filesystem? I have been moving files around over the weekend and I need to make sure they will all fit on their DLT tapes.

Cheers,

Christian Briddon

[Mark van Hassel · Accepted solution]

Hi,

You can use bdf or df -k to get a file system usage overview. Alternatively you can use du -k on directories, files etc.

See man pages for more info.

HtH,

Mark

[John Strang]

Use du -sk

This gives Disk Usage in kb. If you want more detailed information for the filesystem you can omit the 's' flag.

HTH,

John

[Justo Exposito]

Hi,

You can use bdf and then the result are in bytes.

If you use du command the result are in 512 bytes blocks.

Regards,

Justo.

[Magdi KAMAL]

Hi,

You may use the command :

# df -k

for displaying all used and free spaces on file-systems in Kilo-Bytes.

or

# df -k

for displaying only a specific directory used and free spaces on a file-system in Kilo-Bytes.

Then calculate the total amount to check if it stand on DLTs.

Magdi

[Roger Baptiste]

hi,

Clean way is , put this in a script file, say neat-bdf:
****
/bin/bdf "$@" 2>&1 | awk ' { if(NF == 1) { getline n; sub("^[ ]*", " ", n); print $0" "n; next } }
{ print }'
****

and execute it:

#neat-bdf >bdf.out

that will give the sizes of each filesystem in a single line in kbs


HTH
raj

[Heiner E. Lennackers]

Hi,

if you like to use du or bdf, i would prefer to use du -sk rather then
bdf -kl . Two reasons:
1. If you backup only subdirs of a filesystem, bdf -kl will not match at all because it only shows complete filesystems.
2. bdf -kl does not count the size a sparse file will use on tape.

But even du does not count real bytes, because it is block-aligned. If you need the exact size you can use ll or find and ll to add them up.

Heiner

[Trond Haugen]

bdf will tell you the kilobyte usage of a mounted filesystem.
If you only want a certain tree of it you can use 'du -k /dir' to get Kb.
Here is a small script I have written to better display larger figures (Mb, Gb):

du_it()
{
bytes=`du -s | cut -f1 -d" "`

if [ $bytes -le 999999 ]
then
bytes=`expr $bytes \* 512`
kbytes=`expr $bytes \/ 1000`
else
kbytes=`expr $bytes \/ 2`
fi

if [ $kbytes -gt 999 ]
then
mbytes=`expr $kbytes \/ 1000`
xbytes=`expr $mbytes \* 1000`
kbytes=`expr $kbytes - $xbytes`
if [ $kbytes -le 10 ]
then
kbytes="00$kbytes"
fi

if [ $kbytes -le 100 ]
then
kbytes="0$kbytes"
fi

if [ $mbytes -gt 999 ]
then
gbytes=`expr $mbytes \/ 1000`
xbytes=`expr $gbytes \* 1000`
mbytes=`expr $mbytes - $xbytes`
if [ $mbytes -le 10 ]
then
mbytes="00$mbytes"
fi

if [ $mbytes -le 100 ]
then
mbytes="0$mbytes"
fi
echo "In `pwd`\t you have used $gbytes,$mbytes Gbytes."

else

echo "In `pwd`\t you have used $mbytes,$kbytes Mbytes."
fi
else
echo "In `pwd`\t you have used $kbytes Kbytes."
fi
}

if [ $# -gt 0 ]
then
startdir=`pwd`
for dirs in $*
do
if [ -d "$dirs" ]
then
cd $dirs
du_it
fi
cd $startdir
done
else
du_it
fi

Regards,
Trond