df -h whats this?

Jukas · 01-13-2007, 03:40 PM

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

Brian1 · 01-13-2007, 04:03 PM

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

syg00 · 01-13-2007, 04:53 PM

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.

Jukas · 01-13-2007, 06:15 PM

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?

syg00 · 01-13-2007, 06:39 PM

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.

reddazz · 01-13-2007, 07:11 PM

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.