LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Security
User Name
Password
Linux - Security This forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.

Notices


Reply
  Search this Thread
Old 01-13-2007, 03:40 PM   #1
Jukas
Member
 
Registered: Mar 2005
Posts: 141

Rep: Reputation: 15
df -h whats this?


checking my disk space on a couple of systems (debian etch) I found a couple things I'm not used to seeing.

Box1
Code:
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             1.4G  211M  1.1G  17% /
tmpfs                 490M     0  490M   0% /lib/init/rw
udev                   10M   60K   10M   1% /dev
tmpfs                 490M     0  490M   0% /dev/shm
/dev/sda9              92G  3.8G   84G   5% /home
/dev/sda8             449M  8.1M  417M   2% /tmp
/dev/sda6             4.6G  701M  3.7G  16% /usr
/dev/sda7             9.2G  1.1G  7.7G  13% /var
/dev/hdc1              15G  3.8G  9.9G  28% /backup
/dev/hdc2             133G   62G   65G  49% /ftp
Box2
Code:
Filesystem            Size  Used Avail Use% Mounted on
/dev/hda1             4.6G  638M  3.8G  15% /
udev                   10M   72K   10M   1% /dev
devshm               1010M     0 1010M   0% /dev/shm
/dev/hda9             102G  5.3G   92G   6% /var
/dev/hda8              92G  332M   87G   1% /home
/dev/hda7             669M   20M  614M   4% /tmp
/dev/hda5              14G  1.1G   12G   9% /usr
/dev/hda6              14G  2.7G   11G  21% /backup
What are the items entered in bold? I checked and there's not entry for them in /etc/fstab
 
Old 01-13-2007, 04:03 PM   #2
Brian1
LQ Guru
 
Registered: Jan 2003
Location: Seymour, Indiana
Distribution: Distribution: RHEL 5 with Pieces of this and that. Kernel 2.6.23.1, KDE 3.5.8 and KDE 4.0 beta, Plu
Posts: 5,700

Rep: Reputation: 65
The udev is a virtual partition used by the udev service. Goto google and search on udev to learn more about it. devshm not sure but problably related. Google can explain this as well.

Brian
 
Old 01-13-2007, 04:53 PM   #3
syg00
LQ Veteran
 
Registered: Aug 2003
Location: Australia
Distribution: Lots ...
Posts: 21,188

Rep: Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131
Have a look inyour source tree for a file called tmpfs.txt - probably ../Documentation/filesystems
Plenty of good stuff there - even if some is a little old.

udev is the devfs replacecment for handling device nodes.
 
Old 01-13-2007, 06:15 PM   #4
Jukas
Member
 
Registered: Mar 2005
Posts: 141

Original Poster
Rep: Reputation: 15
Thanks for the replies, I'll dig futher down into that. What concerns me is

Code:
tmpfs                 490M     0  490M   0% /lib/init/rw
Any idea what that is?
 
Old 01-13-2007, 06:39 PM   #5
syg00
LQ Veteran
 
Registered: Aug 2003
Location: Australia
Distribution: Lots ...
Posts: 21,188

Rep: Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131Reputation: 4131
Looks like a Debian special - google finds a hit "boot and shutdown tmpfiles and device nodes".
I'm not a Debian user, but I'd reckon you'll need to go through the init scripts.
 
Old 01-13-2007, 07:11 PM   #6
reddazz
LQ Guru
 
Registered: Nov 2003
Location: N. E. England
Distribution: Fedora, CentOS, Debian
Posts: 16,298

Rep: Reputation: 77
There really is nothing to worry about from the output you posted. tmpfs is just a temporary filesystem where things are stored in virtual memory. As others mentioned, search on google for detailed info or browse through the kernel docs.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Whats new in ES 4 gardenair Linux - Enterprise 3 03-08-2006 05:30 AM
Whats Best For Me? andy_play Linux - Newbie 4 11-09-2005 06:26 PM
whats it like compfreak221 Fedora 1 11-07-2004 06:52 PM
whats this mean? iLLuSionZ Linux - Newbie 2 11-16-2003 02:40 AM
Whats the Best?...... andyjenk Linux - Newbie 8 09-16-2002 09:02 PM

LinuxQuestions.org > Forums > Linux Forums > Linux - Security

All times are GMT -5. The time now is 01:11 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration