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The university acquired a UNIX source license from AT&T.
ZFS was previously an open source filesystem that was first developed by Sun Microsystems, but when Oracle acquired Sun, ZFS became a proprietary product.So if one of the nodes goes down, other nodes still can serve the requests.Snapshots allow reliable backup of a live filesystem.the project delivers kernel, device drivers, userland utilities and documentation, as opposed to Linux delivering a kernel and drivers only and relying on third-parties for system software; and Free BSD source code is generally released under a permissive BSD license as opposed to the copyleft GPL used by Linux.The Free BSD project includes a security team overseeing all software shipped in the base distribution.Free BSD provides two frameworks for data encryption: GBDE and Geli. GBDE was written by Poul-Henning Kamp and is distributed under the two-clause BSD license.
Geli is an alternative to GBDE that was written by Pawel Jakub Dawidek and first appeared in Free BSD 6.0.
By 1997, Free BSD was Walnut Creek's "most successful product".
The company itself later renamed to The Free BSD Mall and later i Xsystems.
The X Window System is not installed by default, but is available in the Free BSD ports collection.
A number of Desktop environments such as GNOME, KDE and Xfce, and lightweight window managers such as Openbox, Fluxbox and dwm are also available to Free BSD.
Free BSD is a free and open-source Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD).