[opensuse] /sys virtual file system
I'm updating a Linux presentation, and I'm looking for a good description of /sys. I already have a good piece on the /proc pseudo file system,, but not on /sys. -- Jerry Feldman <gaf@blu.org> Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9
Jerry Feldman wrote:
I'm updating a Linux presentation, and I'm looking for a good description of /sys. I already have a good piece on the /proc pseudo file system,, but not on /sys.
I would start out by running the following command: $ tree -pfi /sys > ~/systree Most of /sys is completely obvious -- remember, every computing environment is a MAN-MADE environment, and thus, naming conventions and information conform to some sort of naming convention or another. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, Dec 02, 2007 at 07:44:59PM -0500, Jerry Feldman wrote:
I'm updating a Linux presentation, and I'm looking for a good description of /sys. I already have a good piece on the /proc pseudo file system,, but not on /sys.
What specifically do you want to know about /sys? It's a virtual filesystem, a portion of which exports the internal relationship between all real and virtual devices that the kernel knows about. It contains one value per file, in text for, with the exception of a very few binary files that are "pass-through" directly to to the raw hardware. It also contains mount points for debugfs (at /sys/kernel/debug), and securityfs (/sys/kerenel/debug). Does that help out? If you have specific questions, feel free to ask. I'd be interested to see what you have for /proc as well, because over time, it has been migrating to a "process things only" information. All device and other system-wide information things have been moving to /sys. thanks, greg k-h -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, 2 Dec 2007 19:59:45 -0800 Greg KH <gregkh@suse.de> wrote:
On Sun, Dec 02, 2007 at 07:44:59PM -0500, Jerry Feldman wrote:
I'm updating a Linux presentation, and I'm looking for a good description of /sys. I already have a good piece on the /proc pseudo file system,, but not on /sys.
What specifically do you want to know about /sys?
It's a virtual filesystem, a portion of which exports the internal relationship between all real and virtual devices that the kernel knows about. It contains one value per file, in text for, with the exception of a very few binary files that are "pass-through" directly to to the raw hardware.
It also contains mount points for debugfs (at /sys/kernel/debug), and securityfs (/sys/kerenel/debug).
Does that help out?
If you have specific questions, feel free to ask.
I'd be interested to see what you have for /proc as well, because over time, it has been migrating to a "process things only" information. All device and other system-wide information things have been moving to /sys.
Thanks. That answers my question. -- Jerry Feldman <gaf@blu.org> Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9
On Mon, Dec 03, 2007 at 07:32:21AM -0500, Jerry Feldman wrote:
On Sun, 2 Dec 2007 19:59:45 -0800 Greg KH <gregkh@suse.de> wrote:
On Sun, Dec 02, 2007 at 07:44:59PM -0500, Jerry Feldman wrote:
I'm updating a Linux presentation, and I'm looking for a good description of /sys. I already have a good piece on the /proc pseudo file system,, but not on /sys.
What specifically do you want to know about /sys?
It's a virtual filesystem, a portion of which exports the internal relationship between all real and virtual devices that the kernel knows about. It contains one value per file, in text for, with the exception of a very few binary files that are "pass-through" directly to to the raw hardware.
It also contains mount points for debugfs (at /sys/kernel/debug), and securityfs (/sys/kerenel/debug).
Does that help out?
If you have specific questions, feel free to ask.
I'd be interested to see what you have for /proc as well, because over time, it has been migrating to a "process things only" information. All device and other system-wide information things have been moving to /sys.
Thanks. That answers my question.
But it didn't answer mine to you :) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Mon, 3 Dec 2007 05:12:13 -0800 Greg KH <gregkh@suse.de> wrote:
On Mon, Dec 03, 2007 at 07:32:21AM -0500, Jerry Feldman wrote:
On Sun, 2 Dec 2007 19:59:45 -0800 Greg KH <gregkh@suse.de> wrote:
On Sun, Dec 02, 2007 at 07:44:59PM -0500, Jerry Feldman wrote:
I'm updating a Linux presentation, and I'm looking for a good description of /sys. I already have a good piece on the /proc pseudo file system,, but not on /sys.
What specifically do you want to know about /sys?
It's a virtual filesystem, a portion of which exports the internal relationship between all real and virtual devices that the kernel knows about. It contains one value per file, in text for, with the exception of a very few binary files that are "pass-through" directly to to the raw hardware.
It also contains mount points for debugfs (at /sys/kernel/debug), and securityfs (/sys/kerenel/debug).
Does that help out?
If you have specific questions, feel free to ask.
I'd be interested to see what you have for /proc as well, because over time, it has been migrating to a "process things only" information. All device and other system-wide information things have been moving to /sys.
Thanks. That answers my question.
But it didn't answer mine to you :)
I currently only have a 1-liner in the presentation. But, I was planning on showing the attendees how to view things like /proc/cpuinfo and /proc/meminfo. My audience consists of a few PHD/actuaries who just need to be able to use Unix and Linux to run various products. The do, however, have VMWare Workstation installed on their systems with a Linux VM guest. I'm not sure if the guest is Ubuntu or RHEL 4. They all have logins to various corporate Linux and Solaris systems. -- Jerry Feldman <gaf@blu.org> Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9
participants (3)
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Aaron Kulkis -
Greg KH -
Jerry Feldman