Linux Demo Command Open machine

The Linux kernel was originally written by Finns Linas Tovaz (Linus Torvalds) at the University of Helsinki for personal hobbies.

Linux is a free-to-use and free-to-propagate Unix-like operating system, a POSIX and Unix-based multiuser, multitasking, multi-threaded and multi-CPU operating system.

Linux can run major UNIX tool software, applications, and network protocols. It supports 32-bit and 64-bit hardware. Linux inherits the design idea of Unix as the core of network, and is a stable multi-user network operating system.

There are various Linux distributions available today, from embedded devices to supercomputers, and in the server domain, usually using lamp (Linux + Apache + mysql + php) or LNMP (Linux + nginx+ MySQL + php) Combination

At present, the domestic Linux more is applied to the server, and the desktop operating system is more using window. The main differences are as follows:

Compare	Windows	Linux
Interface	Unified interface, Shell fixed all Windows Program menu almost consistent, shortcut keys are almost the same	Graphical interface styles vary from release to version and may not be compatible. Gnu/linux's terminals are inherited from UNIX, and the basic commands and operating methods are almost identical.
Driver Program	The driver is rich and the version is updated frequently. The default installer typically contains hardware drivers that are popular at the time of release, and the new hardware drivers are dependent on the hardware vendor. For some old hardware, it is sometimes difficult to support without the original driver. In addition, sometimes the hardware vendor does not provide the required version of the driver under Windows, it will also compare headaches.	Developed by volunteers, released by the Linux core development team, many hardware vendors do not provide drivers based on copyright considerations, although most do not require manual installation, but involve installation is relatively complex, allowing new users to face driver problems (presence and installation methods) helpless. But in open source development mode, many old hardware is easy to find, though it is hard to support under Windows. Hardware vendors such as HP, Intel, AMD and others are gradually supporting open source drivers, and the problem is being mitigated.
Use	Simple to use, easy to get started. The graphical interface is advantageous for users without computer background knowledge.	The graphical interface is simple to use and easy to get started. Text interface, you need to learn to master.
Learn	The system structure is complex, the change is frequent, and the knowledge and skills are eliminated quickly, in-depth learning difficulties.	The system structure is simple and stable, and the knowledge and skills are good, so it is relatively easy to study deeply.
Software	Each specific feature may require the support of a commercial software and must be purchased with the appropriate authorization.	Most software is freely available, with fewer software options for the same functionality.

Like programming languages, the first thing to try is HelloWorld

Here, our Linux is equipped to try to shut down by command.

When equipped, enter the main interface and enter the code interface.

First of all, this is in the identity you set up, to switch to the administrator's identity to be able to do

Operation input

Su-

can also be entered

Su

The results are different.

will prompt for a password, after the password verification is successful, it appears as follows, indicating access to the administrator

Shutdown command:

Shutdown--R now restart the computer reboot restart the  computer

Exit Administrator as input

Or

Exit

It will exit the interface.

Linux Demo Command Open machine