Differences between linux and unix

Source: Internet
Author: User
Unix exists before posix, while linux exists after posix. at first, linux was a copy of minix, which is the same as many linux software. linux is a branch of unix, other branches include freebsd and so on. UNIX is the system under the command line. linux is added with form management...

Unix exists before posix, while linux exists after posix. at first, linux was a copy of minix, which is the same as many linux software. linux is a branch of unix, other branches include freebsd, etc. UNIX is a command line system. linux is a system with form Management.
UNIX is a powerful multi-user, multi-task operating system with comprehensive performance. it can be used on a variety of platforms from a giant computer to a general PC. it is the most widely used and influential operating system.
Linux is an operating system with the same appearance and performance as UNIX. However, Linux does not come from any version of UNIX source code, but is similar to UNIX.

From the development background, Linux has evolved from UNIX. This inheritance allows Linux users to greatly benefit from the contributions of UNIX groups. UNIX is the most widely used and mature operating system in the world. it is a multi-task system developed in the middle of 1970s. although interfaces are sometimes chaotic, there is a lack of centralized standards, but it is still one of the most widely used operating systems. UNIX users can get support and help in many ways. Therefore, Linux, as a clone of UNIX, will also receive corresponding support and help, directly having a strong position of UNIX in the user.

From the usage perspective, the difference between UNIX and Linux is that Linux is an open and free operating system, while UNIX systems basically need to be paid for use. This difference allows us to get a lot of Linux versions and applications developed for them without spending money. When we access the Internet, we will find that almost all the free software available can run on Linux. In addition, a large number of world-class excellent programmers are working hard to develop and provide Linux-based shared software. However, because the Linux source code can be opened, the real commercial application is not yet started. The reason is simple: anyone can understand the weakest link in the system, both attacks and attacks can be implemented.

In terms of products, both UNIX and Linux are operating system names. however, in addition to operating system names, UNIX letters are also trademarks owned by SCO. linux commercially available include RedHat Linux, SuSe Linux, slakeware Linux, domestic red flags, and Turbo Linux. UNIX mainly includes Sun's Solaris, IBM's AIX, HP's HP-UX, and x86 platform's sco unix/UNIXwareUNIX, most of which are the operating systems of hardware vendors for their own hardware platforms, it is mainly related to CPU and so on. for example, Sun's Solaris is used for commercial purposes and is positioned on the workstations and servers where it uses the CPU of the iSCSI/SPARCII. of course, Solaris also has an x86 version, linux is also available in the same version as Windows Server.

As for the price, the Linux used by individuals is basically free of charge. different Linux vendors have some optimizations for Enterprise-level applications on basic systems, such as RedHat Enterprise products, these products, including support services, are expensive. For UNIX systems like IBM/HP/SUN, the operating system is usually priced at the device price because it is mainly targeted at its hardware platform.

In terms of performance, Linux is not as comprehensive as UNIX, but it is more than enough for individual users and small applications. generally, if you have the opportunity to use UNIX environments, such as the banking and telecommunications departments, they are generally fixed-type UNIX. For example, SUN in China Telecom, HP in civil aviation, and IBM in banks. Note that different UNIX command sets are different in learning.

Author "sxmalinhu"

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