Solved

Huge difference between output of "du" and "df"

Posted on 2010-09-09
3
690 Views
Last Modified: 2013-12-15

How full is this filesystem?
Can someone explain the discrepancy:
[root@vrc45sd ~]# mount
/dev/sda3 on / type ext3 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
[root@vrc45sd ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              80G   51G   25G  68% /
/dev/sda1              99M   26M   69M  28% /boot
tmpfs                 754M     0  754M   0% /dev/shm
[root@vrc45sd ~]# du -scm /
22466   /
22466   total

Open in new window


Thanks!

0
Comment
Question by:alpha-lemming
3 Comments
 
LVL 6

Accepted Solution

by:
jghelfman40 earned 250 total points
ID: 33640458
I was going to give a straight answer, until I saw this thread:
http://lists.centos.org/pipermail/centos/2009-September/082986.html

You may wish to look at it and do some investigation.

du and df report differently, and there are ways to figure out what is the right amount.

There is no clear answer, as there can be different reasons for the numbers you are seeing.
0
 
LVL 4

Expert Comment

by:ericnils
ID: 33640827
I'm not sure why, but I am getting odd measurements using the -scm options as well.

Try this instead:
du -h --max-depth=0 /
0
 
LVL 40

Assisted Solution

by:omarfarid
omarfarid earned 250 total points
ID: 33641745
have you deleted huge files recently which could be still in use (open) by some processes? Try to reboot and see if there still big difference
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
AD LDAP LDS 3 67
Which is more secure: EAP or machine certificate for IKEv2 VPN? 1 87
open source backup solution 1 29
Ubuntu Apache Webserver - File Permissions 5 42
In my business, I use the LTS (Long Term Support) versions of Linux. My workstations do real work, and so I rarely have the patience to deal with silly problems caused by an upgraded kernel that had experimental software on it to begin with from a r…
I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question