Update 20160826 Understanding Different Classifications of Shell Commands and Their Usage in Linux.md

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Understanding Different Classifications of Shell Commands and Their Usage in Linux
理解 Linux 下不同分类的 Shell 命令及它们的用法
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When it comes to gaining absolute control over your Linux system, then nothing comes close to the command line interface (CLI). In order to become a Linux power user, one must understand the [different types of shell commands][1] and the appropriate ways of using them from the terminal.
In Linux, there are several types of commands, and for a new Linux user, knowing the meaning of different commands enables for efficient and precise usage. Therefore, in this article, we shall walk through the various classifications of shell commands in Linux.
当你打算真正操纵好你的 Linux 系统,没有什么更接近命令行界面。为了成为一个 Linux 高手,你必须能够理解【不同种类的 Shell 命令】【1】并且会在终端下正确的使用它们。
In Linux, there are several types of commands, and for a new Linux user, knowing the meaning of different commands enables for efficient and precise usage. Therefore, in this article, we shall walk through the various classifications of shell commands i
One important thing to note is that the command line interface is different from the shell, it only provides a means for you to access the shell. The shell, which is also programmable then makes it possible to communicate with the kernel using commands.
Different classifications of Linux commands fall under the following classifications: