Greg Kroah-Hartman (GKH) is a Linux kernel developer. He is the current Linux kernel maintainer for the
-stable branch, the staging subsystem, USB, driver core, debugfs, kref, kobject, and the sysfs kernel subsystems, Userspace I/O (with Hans J. Koch), and TTY layer. He also created linux-hotplug, the udev project, and the Linux Driver Project. He worked for Novell in the SUSE Labs division and, as of 1 February 2012, works at the Linux Foundation.
He is a co-author of Linux Device Drivers (3rd Edition) and author of Linux Kernel in a Nutshell, and used to be a contributing editor for Linux Journal. He also contributes articles to LWN.net, the computing news site.
Kroah-Hartman frequently helps in the documentation of the kernel and driver development through talks and tutorials. In 2006, he released a CD image of material to introduce a programmer to working on Linux device driver development.
Kroah-Hartman has been a strong advocate of a stable kernel–user space API.Jonathan Corbet; Alessandro Rubini; Greg Kroah-Hartman (2005). Linux Device Drivers (3rd ed.). Sebastopol, CA: O'Reilly. ISBN 0-596-00590-3.
Kroah-Hartman, Greg (2006). Linux Kernel in a Nutshell (1st ed.). Sebastopol, CA: O'Reilly. ISBN 978-0-596-10079-7.