Empty /sys directory

the who · 06-07-2004, 08:09 PM

I have an empty /sys directory on my system. What's it for?

I tried the forum search and googled for it but did not find anything. (How can I tell Google to search for "/sys" without ignoring the slash?) There's also nothing about it in the FHS it seems.

I also have a "lost+found" directory in / and /home, both are empty, what exactly is their purpose?

Just wondering, not planning to delete them or anything. ;-)

trickykid · 06-07-2004, 08:15 PM

If you have a /sys in / , as far as I know, its not needed. As for the lost&found directories, those are created after your system will perform a fsck on the partitions at bootup, etc.

brenton · 06-07-2004, 08:40 PM

Sysfs is intended to be a replacement for procfs. It's incomplete at the moment, but it was originally created for acpi so it should work with that. (I don't notice any difference, but it might be the limitations of my laptop).

/sys was probably created by a package in slackware-current. It's a mandatory compile in for the 2.6 kernels (i.e. there's no sysfs option in .config). So if your running 2.6, all you have to do is mount it. To fstab, add: "none /sys sysfs defaults 0 0"

shilo · 06-07-2004, 08:44 PM

Try editing your /etc/fstab file. Add the line

Code:

none		/sys		sysfs		defaults		0   0

Reboot and look in your /sys folder. It should have a list of your devices.

the who · 06-08-2004, 07:56 AM

Ah, ok, thanks for the info. I compiled some 2.6* kernels a while ago but returned to my 2.4.26 because of problems with 2.6, so it could also be a leftover from that.

shilo · 06-08-2004, 03:58 PM

It is a leftover.

matt3333 · 06-08-2004, 08:53 PM

I have kernel 2.4.26 and i got a empty /sys directory

brenton · 06-08-2004, 08:58 PM

Quote:

/sys was probably created by a package in slackware-current

Running the 2.6 kernel will not create the directory. It was probably created by one of the new system packages. After that I think it's automatically mounted at boot, there's no need to add it to fstab.