How to create global variables in Linux

Global variables can be created in Linux by following these steps:

1. Open a terminal window and input the following command to create a new global variable and assign a value to it:

export VAR_NAME=value

The variable VAR_NAME represents the name of the variable, while value represents the value of the variable. For example, to create a global variable named MY_VAR and set it to “hello”:

export MY_VAR=hello

1. To verify if a global variable has been successfully created, you can use the following command to display the value of the variable:

echo $VAR_NAME

For example, display the value of MY_VAR:

echo $MY_VAR

1. To automatically set global variables when the system starts, you can add the export command to the bash configuration file. Open a terminal window and enter the following command to open the bash configuration file:

vi ~/.bashrc

Add the following lines to the opened file to set global variables:

export VAR_NAME=value

Save and exit the file.

1. Finally, enter the following command to apply the changes:

source ~/.bashrc

This will reload the bash configuration file and import new global variables.

Now you have successfully created a global variable that can be used anywhere in the system.