Greg Kroah-Hartman is a major Linux kernel developer. , he is the Linux kernel maintainer for the 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, , works at the Linux Foundation.
Kroah-Hartman 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 Linux 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.
He also initiated the development of openSUSE Tumbleweed, the rolling release model edition of openSUSE.