[SOLVED] how to check disk space

mario.almeida · 09-26-2010, 03:02 AM

Hi All,

Code:

df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              50G   47G  602M  99% /

How to find why Avail space shows only 602M?

anon237 · 09-26-2010, 03:12 AM

Hi,

Most often this shows that the logfiles are growing (too big). First cd into /var/log and check the sizes of the log files.

If that doesn't solve it: You can see which directories are the biggest and zoom in with the following command:

du -sh *

Start at the root dir (/), locate the directory that shows the largest size and cd to it. Issue the du command again etc.

Hope this helps.

mario.almeida · 09-26-2010, 03:37 AM

Well, I used du command to check the usage but was unable to find the cause.

Below is the output

Code:

df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              50G   47G  595M  99% /
/dev/sda5              17G   12G  4.4G  73% /bkup
/dev/sda1              97M   13M   80M  14% /boot
none                  3.5G     0  3.5G   0% /dev/shm
/dev/sda2              60G  7.8G   49G  14% /usr
nfs-server:/data/nfs/RT
                      346G  245G   83G  75% /usr/isa/aares/reports-06

Code:

39G	backups
6.5M	bin
12G	bkup
7.3M	boot
168K	dev
52M	etc
780M	home
8.0K	initrd
90M	lib
20M	lib64
16K	lost+found
24K	media
8.0K	misc
8.0K	mnt
8.0K	opt
du: cannot access `proc/7732/task/14095/fd/194': No such file or directory
du: cannot access `proc/7732/task/22403/fd/206': No such file or directory
du: cannot access `proc/7732/task/22403/fd/207': No such file or directory
du: `proc/6532': No such file or directory
du: `proc/6533': No such file or directory
du: `proc/6536': No such file or directory
du: `proc/6539': No such file or directory
du: `proc/6542': No such file or directory
du: `proc/6543': No such file or directory
du: `proc/6549': No such file or directory
du: `proc/6550': No such file or directory
du: `proc/6551': No such file or directory
du: `proc/6571': No such file or directory
du: `proc/6572': No such file or directory
du: `proc/6573': No such file or directory
7.9G	proc
52M	root
20M	sbin
0	selinux
8.0K	srv
0	sys
96M	tmp
8.7G	usr
1.7G	var
70G	total

jean-michel · 09-26-2010, 03:45 AM

all is on the screen your backup folders take a lot of room
49G +12G
and /usr

jean-michel · 09-26-2010, 03:47 AM

39G sorry

anon237 · 09-26-2010, 04:02 AM

Hi,

/bkup is on a different mounted partition, you don't have to take this one into account.

/backups seems to be the culprit and to a lesser extend /usr (both part of /).

Have a look at /backups and (re)move what isn't needed.

Hope this helps.

mario.almeida · 09-26-2010, 05:46 AM

Yes /backups is 39G

50 - 39 = 11G for all other then /backups, /bkup and /usr

50 - 47 = 3G

My question is about 3GB which is free and not shown in df ouput

TobiSGD · 09-26-2010, 06:14 AM

Don't forget the 5% spare space for the root account.

anon237 · 09-26-2010, 06:16 AM

Hi,

If a file system is created using default options, 5% is reserved for root use only and not available for normal users.

50G -> 5% = 2.5G for root use only.
2.5G + 600M -> 3G

Hope this clears things up.