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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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What is going on with /sys/kernel/notes ? (self.linux)

submitted 11 months ago by mvirts to c/[email protected]

3 comments fedilink hide all child comments

Any thoughts on why cat /sys/kernel/notes gives me:

LinuxLinuXen@ XenlinuxXen2.Xenxen-3.Xen��XenXen��&�� XenXeXeXen��XeXengenericXen Xenyes

I'm beginning to look into another issue I posted about, but this struck me as odd

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[–] [email protected] 19 points 11 months ago (1 children)

It was added in a patch to 2.6.23

Notes from the coder:

The bonus feature in my patch series adds the magic file /sys/kernel/notes. Reading this gives you the binary contents of the ELF notes section built into the kernel. Here you can find the build ID of the running kernel. This gives a solution to a problem that has arisen for systemtap users, where nothing prevents them from using the kernel-debuginfo.i586 data to drive Systemtap's probe details, but are actually running the kernel from the kernel.i686 rpm. This is a failure on many levels, but some simple sanity-checking at the bottom always helps. Now it is easy to verify you have the right debuginfo file for the kernel you are running.

This is incorporated upstream now.

[–] Static_Rocket 11 points 11 months ago

Yep, from kernel/ksysfs.c

/*
 * Make /sys/kernel/notes give the raw contents of our kernel .notes section.
 */