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This article mainly explains "what does path refer to in linux". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what does path mean in linux"?

In linux, path means environment variable. Environment variable generally refers to the operating system specified operating system operating environment parameters, equivalent to a pointer, want to see the value of the variable need to add "$", use the "echo $PATH" command to view the current environment variable.

The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What does path mean in linux

PATH is an environment variable. You can view the current environment variable by using the command echo $PATH. If you need to modify it, you can append it later. For example, if you want to add / etc/apache2/bin as an environment variable, you can write:

PATH=$PATH;/etc/apache2/bin

And then enter the car.

1.1 meaning of environmental variables

Environment variables generally refer to some parameters in the operating system that specify the operating system environment. It is equivalent to a pointer, and to see the value of a variable, you need to add "$".

1.2 Classification of environmental variables

1.2.1 according to the scope of action

Variables in Linux can be divided into environment variables and local variables:

1) Environment variables: equivalent to global variables, exist in all Shell and have inheritance

2) Local variables: equivalent to local variables only exist in the current Shell, local variables contain environment variables, and non-environment variables do not have inheritance.

1.2.2 by life cycle

1) permanent: the configuration file needs to be modified and the variable takes effect permanently.

2) temporarily: use export definition to disable Shell.

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