Difference and connection
Linux is a free Unix-type operating system, originally created by Linus Torvalds with the help of developers all over the world. The source code of Linux is developed under the GNU General Public License, and everyone can get it for free. Click the link below to learn more about the operating system that is causing a revolution in the computer world.
The biggest difference between Linux and UNIX is that the former is a free software that develops source code, while the latter is a traditional commercial software that protects source code with intellectual property rights. This should be their biggest difference, which is reflected in the fact that the former users have high autonomy, but the latter can only adapt passively; This difference is also manifested in that the former is developed in a completely open environment, while the latter is developed in a completely black box, and only the relevant developers can access the prototype of the product.
The origin of Linux can be traced back to the oldest UNIX. From 65438 to 0969, ken Thompson of Bell Laboratories began to develop a multi-user and multi-task operating system with an idle PDP-7 computer. Soon, dennis ritchie joined the project, and the earliest UNIX was born with their joint efforts. Inspired by the early project Multics, Richie named this operating system Unix. The early UNIX was written in assembly language, but its third version was redesigned with a brand-new programming language C, which was designed by Richie to write the operating system. Through this rewriting, Unix can be transplanted to more powerful computers DECPD- 1 1/45 and 1 1/70. What happened later, as they say, has become history. Unix came out of the lab and became the mainstream of the operating system. Now almost every major computer manufacturer has its own version of Unix.
Linux originated from the simple needs of students. Linus Torvalds, the author and main maintainer of Linux, the only software he could afford in college was Minix. Minix is a simple operating system similar to Unix, which is widely used in auxiliary teaching. Linus was not satisfied with Minix, so he decided to write his own software. He started his work on Intel 386 PC based on Unix, which he was familiar with when he was a student. He has made rapid progress. Encouraged by his work, he shared this achievement with other students through the internet, which was mainly used in the academic field. Someone saw the software and began to distribute it. Whenever a new problem arises, someone will immediately find a solution and join it. Soon Linux became an operating system. It is worth noting that Linux does not include Unix source code. It is rewritten according to the published POSIX standard. Linux uses a lot of GNU software funded by Cambridge Free Software Company, Massachusetts, and Linux itself is constructed by them.
The other two big differences are:
1) UNIX systems are mostly hardware, while Linux can run on various hardware platforms.
2) UNIX is commercial software, while Linux is free software, which is free and open source.
Unix ($50,000) and Linux are free.
[history]
Unix has a longer history than Linux. The idea of Linux originated from Unix.
[product]
Unix and linux are the names of operating systems, but the four letters unix are not only the names of operating systems, but also owned by SCO as trademarks.
Linux is commercialized by RedHat Linux, SuSe Linux, slakeware Linux, domestic Red Flag and Turbo Linux.
Unix mainly includes Solaris of Sun, AIX of IBM, HP-UX of HP, SCO Unix/Unixware of x86 platform.
[Other differences]
The core of linux is free, free to use, and the core source code is open.
And the core of unix is not public.
In terms of hardware requirements, linux has lower requirements than unix and is easier to master in installation.
In use, linux is relatively less complicated than unix.
Unix is mostly the operating system of hardware manufacturers for their own hardware platforms, mainly involving CPU, etc. For example, Sun's Solaris, as a commercial product, is located on its workstations and servers using SPARC/SPARCII CPU. Of course, Solaris also has x86 version, and Linux also has its RISC version.
But to be exact, it is inappropriate to compare Unix on RISC with Linux on x86.
As for the price, personal use of Linux is basically free. Different Linux publishers have optimized their basic systems for enterprise-level applications, such as RedHat's enterprise-level products, which are more expensive, including support services.
Unix, like IBM/HP/SUN, is mainly aimed at its hardware platform, so the operating system is usually included in the equipment price. No one will buy a Unix operating system alone.
In performance, linux is not as comprehensive as unix, but it is basically aimed at individuals.
More than enough for users and small applications.
Usually, if you have the opportunity to use a Unix environment, such as banking and telecommunications, it is usually a fixed mode of Unix. For example, SUN in telecommunications is the majority, HP in civil aviation is the majority, and IBM in banks is the majority. In learning, different Unix command sets are somewhat different, so we should pay attention to them.
As for learning, I think linux is a little more studious, and I like learning now.
There are more and more people playing with linux, all kinds of information about linux.
There are many. If you want to teach yourself, then Linux or BSD system is a good choice. X86 machines will do.
In application, Linux can be used by general enterprises or individuals unless it is a large website.
UNIX is a multi-user and multi-task operating system with powerful functions and comprehensive performance. It can be applied to many different platforms, from supercomputers to ordinary PCs. It is the most widely used and influential operating system.
Linux is an operating system with the same or better appearance and performance as UNIX. However, Linux is not derived from any version of UNIX source code, nor is it UNIX, but a product similar to UNIX. Linux products have successfully imitated UNIX systems and functions. Specifically, Linux is a set of operating systems compatible with System V and BSD UNIX. For System V, the source code of the software program can be recompiled and run under Linux, while for BSD UNIX, its executable file can be run directly under Linux environment.
Generally speaking, Linux is an operating system that conforms to POSIX (Portable Operating System Environment) specifications. It can realize all the functions of UNIX on ordinary PC, and has the ability of multi-task and multi-user. Another main reason why Linux is loved by computer enthusiasts is that it has all the functions of UNIX, and anyone who uses UNIX operating system or wants to learn UNIX operating system can benefit from Linux.
In terms of network management ability and security, everyone who has used Linux admits that Linux is very similar to UNIX. UNIX system has been used as a high-end application or server system, so it has a set of perfect network management mechanisms and rules. Linux follows these excellent rules, which makes the network configurable and provides great flexibility for system management.
References:
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