Functional characteristics of FreeBSD

FreeBSD's operating environment is a personal computer that uses the Intel x86 series processor, and of course it runs on compatible chips on companies such as AMD and Cyrix (FreeBSD is also ported to RISC workstation environments using SPARC and alpha chips. However, these platforms are not the main operating platforms for FreeBSD, and the corresponding porting versions are not perfect.

As can be seen from the origins and development of FreeBSD, FreeBSD is a free UNIX system developed by volunteers, such as computer scientists and software engineers, to provide free UNIX operating systems without any additional conditions for all consumers. People who first contact free software may doubt the application function, performance, etc. of the software. But the free access and use of the personal computer hardware environment does not mean that the FreeBSD system is just a personal user's toy, and in fact FreeBSD is able to do almost any other Unix work, with a wide range of applications and excellent performance. Using FreeBSD as a network server operating system on the network is common, and FreeBSD is also a shortcut to making PCs a high-performance UNIX workstation.

Characteristics and application range of FreeBSD

FreeBSD is mainly characterized by its high performance and high reliability, in addition to BSD Unix itself is already a very mature operating system, F REEBSD development team also based on the actual work of the task, spent a considerable amount of time for system debugging, to achieve maximum performance and maximum reliability. Its performance and reliability are not inferior to any commercial UNIX system, or even better.

--freebsd is a real 32-bit operating system, not an upgraded version of any 16-bit operating system. It is the result of a very mature BSD Un IX porting to the Intel 386 system's processors, and the system core does not contain any 16-bit code or any 16-bit software, which improves system stability.

--FREEBSD has adjustable dynamic priority preemptive multitasking capability. Enable multiple applications to be very smooth sharing system resources, even under high load can still be a smooth switch between different tasks, and will not occur because individual tasks exclusive system resources, other tasks resulting in a standstill, deadlock phenomenon, and will never cause the entire system deadlock.

--freebsd is a multi-user operating system that enables multiple users to use FreeBSD systems at the same time, sharing system resources such as disks, peripherals, and processors. Each user can also start multiple tasks at the same time, making it more productive.

--FREEBSD fully supports the TCP/IP protocol. FreeBSD can be easily integrated with other TCP/IP-enabled systems, serving as internet/intranet servers, providing nfs,ftp,email,www, routing, and firewall capabilities.

--the memory protection mechanism within its operating system keeps each application and user from interfering with each other. Once a task crashes, other tasks continue to run as usual. Since there is no 16-bit code in the FreeBSD, this makes it truly possible to ensure the robustness of the system.

--freebsd uses another famous free software, XFREE86, to provide an industrial standard X-Window System (X11R6), which can run a variety of graphical interface software on X to provide user-friendly graphical interface and application software.

-It also supports binary execution files for other Unix operating systems running on Intel's 386 chips, including SCO Unix,b Sd/os,netbsd,linux. The ability to run the binary applications of these systems directly without recompiling has greatly enriched the available application software under FR Eebsd.

--FREEBSD's ports collections includes thousands of instantly available applications, making it easy to install applications. FreeBSD is compatible with many other Unix at the source level, and due to the tremendous impact of BSD in UNIX and Internet development, most software is developed under a BSD-like system, so FreeBSD is the easiest platform to migrate, There are a lot of software on the Internet that can easily be ported to FreeBSD.

-Efficient virtual memory management structure, you can allocate the memory space according to the need, only when necessary, the data in memory is exchanged to switch equipment. And the disk buffer is not separate, but with virtual storage integrated, so that FreeBSD can efficiently meet the requirements of a large number of memory applications, but also the most efficient use of memory to buffer hard disk data, improve read and write hard disk efficiency.