UNIX for Dummies Questions & Answers

dear all,


I have some problem in my file system :
df -k result :
...
/dev/md/dsk/d3 3101839 2736380 303423 91% /var
...
it occupied around 2.7 gb
but when I tried command
du -sk /var
813991 /var
so /var only have around 800Mb , Do you know why there is many difference between df -k and du -sk command ?
Do you have any tips to free some space in /var ?

Cheers,
-fuad-

try maybe something like this:

du -sk /var/*

have a look at /var/tmp for deleting files. also there might be unneeded logs in /var/adm or /var/log (depends on your os).

hth,
DN2

I have run du -sk in /var directory and subdirectory inside it, and also run find to search for file that has large size but it doesn't help much. Now I run out ideas.

I curious why there is so much difference in the result of df -k and du -sk , do I need to reboot my server ?

thanks,
-Fuad-

post the output of:

Code:

# df -k (better h if possible)
# mount
# metastat -p

and lets have a look at your config...

you might also want to search for files that are .zip, .tar.gz, .log[s] , or files with size +20Mb etc etc using the find command.

df -k
Filesystem kbytes used avail capacity Mounted on
/dev/md/dsk/d0 3101839 2286604 753199 76% /
/proc 0 0 0 0% /proc
fd 0 0 0 0% /dev/fd
mnttab 0 0 0 0% /etc/mnttab
/dev/md/dsk/d3 3101839 2599387 440416 86% /var
swap 2061520 32 2061488 1% /var/run
swap 256000 2176 253824 1% /tmp
/dev/md/dsk/d4 57027422 7085383 49371765 13% /export/home

metastat -p
d0 -m d10 d20 1
d10 1 1 c1t0d0s0
d20 1 1 c1t1d0s0
d1 -m d11 d21 1
d11 1 1 c1t0d0s1
d21 1 1 c1t1d0s1
d3 -m d13 d23 1
d13 1 1 c1t0d0s3
d23 1 1 c1t1d0s3
d4 -m d14 d24 1
d14 1 1 c1t0d0s4
d24 1 1 c1t1d0s4

mount
/ on /dev/md/dsk/d0 read/write/setuid/intr/largefiles/logging/onerror=panic/dev=1540000 on Thu Mar 8 02:25:20 2007
/proc on /proc read/write/setuid/dev=4c40000 on Thu Mar 8 02:25:19 2007
/dev/fd on fd read/write/setuid/dev=4d00000 on Thu Mar 8 02:25:24 2007
/etc/mnttab on mnttab read/write/setuid/dev=4e00000 on Thu Mar 8 02:25:26 2007
/var on /dev/md/dsk/d3 read/write/setuid/intr/largefiles/logging/onerror=panic/dev=1540003 on Thu Mar 8 02:25:27 2007
/var/run on swap read/write/setuid/dev=1 on Thu Mar 8 02:25:27 2007
/tmp on swap read/write/setuid/size=250m/dev=2 on Thu Mar 8 02:25:31 2007
/export/home on /dev/md/dsk/d4 read/write/setuid/intr/largefiles/logging/onerror=panic/dev=1540004 on Thu Mar 8 02:25:32 2007

if du -k /var gives a different result to du -xk /var then you may have some data being left behind at the mount point /var/run. How you get to it will be OS dependent, but you will probably want to bring the machine to single user mode, and turn off as many services as you can. Then try umount /var/run. If it unmounts then have a look at the mount point to see if there is any data there (ls -l /var/run). If so, delete it and remount the partition.

Though, it is very strange that du gives a different usage result to df.

btw the -x switch to du keeps it on the starting filesystem, so it shouldn't go off into the mounted /var/run.