What is BSD

BSD (Berkeley Software Distribution) is a derivative of Unix that was developed and released by the University of California at Berkeley between 1977 and 1995. Historically, BSD was once considered a UNIX ——"BSD UNIX" because it shares the underlying code and design with the AT&T UNIX operating system. In the 1980s, many variants of UNIX licensed software were derived. More famous such as DEC's Ultrix and Sun's SunOS. In the 1990s, BSD was largely replaced by System V4.x and OSF/1. The late BSD version provided a platform for several open source software developments and has been in use ever since. Today, "BSD" does not specifically refer to any BSD derivative, but a generic term for a branch of a UNIX-like operating system.

open Derivative

BSD operating system for different uses and different users, may be applied to a variety of hardware architecture. BSD can often be seen in government agencies. Although the following BSD features may not be unique, each BSD has a good reputation in its field, with some focusing on performance and others on security.

DragonflyBSD is the youngest BSD that offers a more symmetrical multiprocessor system than FreeBSD, and allows the kernel to directly support SSI clusters for better computing results. This project started in this direction for several years, mainly focusing on the i386 platform.

FreeBSD is known for its ease of use and high performance in the BSD family. Because it is mainly used as a microprocessor architecture, such as i386, AMD's 64-bit i386 extension, FreeBSD is very concerned about multiprocessors. FreeBSD runs very well on i386 and amd64 servers, and of course it can run on other hardware architectures.

NetBSD has exceptional portability, running on up to 54 platforms, from embedded handheld devices to server farms, and NetBSD even on the International Space Station.

OpenBSD is particularly good at cryptography and security, and it's also very portable, certainly less than NetBSD. Security features such as OpenSSH were pioneered by OpenBSD. OpenBSD operates as a security demanding machine and is well received.

It must be noted that the above list is based more on perceptual knowledge and focuses on its development, and does not strictly compare rules. In fact, each specific BSD can serve many role tasks.

PCBSD is a freebsd-based open source operating system for desktop applications. Pcbsd has developed a new software installation method, the PBI format, which makes it easy to apply. In addition, the BSD version focusing on desktop applications and DesktopBSD and other

and Linux differences

BSD is an important branch of Unix, itself is Unix, Linux is not Unix, but only Unix -like operating system. BSD uses the BSD protocol to publish its binary files and source code, while Linux uses the GPL protocol. Due to legal disputes and many other reasons, BSD, which is also a free software, has not spread as widely as Linux.

BSD License Agreement (also known as BSD License)

The BSD license was originally used on the 4.4BSD/4.4BSD-Lite version published by the University of California at Berkeley (BSD is Berkly). The abbreviation of Software Distribution) has gradually been used. In 1979, the University of California at Berkeley released BSD Unix, known as the pioneer of open source, and the BSD license was developed with BSD Unix. BSD licenses are now adopted by open source software such as Apache and BSD operating systems.

Compared to the rigor of GPL licenses and MPL licenses, the BSD license is much more relaxed, just the original text of the license, but it is more interesting that it requires all further Developers put their own copyright information on it, so software that is released under the BSD license may encounter a small situation where the copyright material license occupies more space than the program.