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Environment variables in Linux are dynamic named values that can affect the way running processes will behave on a computer. They are used to store information such as the default text editor, system locale, or the path to executable files.
Setting Environment Variables
To set an environment variable in Linux, you can use the export command. This command sets the variable for the current session. For example, to set a variable named MY_VAR with the value Linuxize, you can use the following command:
export MY_VAR='Linuxize'You can verify that the variable is set by using the printenv command:
printenv MY_VARThe output should be:
LinuxizePersistent Environment Variables
To make environment variables persistent across sessions, you need to define them in the shell configuration files. For example, if you are using Bash, you can add the variable to the ~/.bashrc file:
echo 'export MY_VAR="Linuxize"' >> ~/.bashrc How to Set and List Environment Variables in Linux
Variables have the following format: 1. The names of the variables are case-sensitive. By convention, environment variables should have UPPER CASE names. 2. When assigning multiple values to the variable they must be separated by the colon :character. 3. There is no space around the equals … See more
The most used command to displays the environment variables is printenv. If the name of the variable is passed as an argument to the command, only the value of that variable is … See more
To make Environment variables persistent you need to define those variables in the bash configuration files. In most Linux distributions when you start a new session, environment … See more
To better illustrate the difference between the Shell and Environment variables we’ll start with setting Shell Variables and then move on to the Environment variables. To create a new shell … See more
In this guide, we have shown you how to set and list environment and shell variables. Feel free to leave a comment if you have any … See more
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Dec 5, 2024 · In this tutorial, you will learn how to set, view, export, and remove environment variables in Linux. A system running Linux (for other operating …
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Shells convert each² of the variables they receive from their environment to a shell variable, so the var environment variable sh receives will be converted to a $var variable, and when it expands …
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Aug 27, 2011 · To set an environment variable everytime, use the export command in the .bashrc file (or the appropriate initialization file for your shell). To set an environment variable from a …
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Dec 15, 2023 · The set command in Linux is a built-in shell command used to set or unset values of shell options and positional parameters. The basic use syntax is, set [options] [arguments] . It’s like a master control panel for your shell …
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Feb 8, 2023 · Linux set environment variable to configure look and feel of shell. Set up terminal settings depending on which terminal you’re using. Set the search path such as JAVA_HOME, and ORACLE_HOME. Create environment …
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Mar 18, 2024 · In this tutorial, we’ll first demonstrate how to set environment variables only for one single command. Further, we’ll address how to set environment variables for all future commands in the same Bash session. …
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5 days ago · Confirming a Variable Is Set. To check if a variable exists: printenv VAR_NAME. If no output appears, the variable is unset or not exported. To verify if it exists only in the shell: set | …
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Jul 13, 2023 · User defined variables are typically set by user, either temporarily for the current shell or permanently. The whole concept of setting and un-setting environment variables revolves around some set of files and few commands …
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Apr 24, 2023 · To set an environment variable temporarily for the current session, you can use the export command in the terminal. The syntax is as follows: For example, to set an environment …
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Feb 24, 2025 · To create a new variable for the current session, specify its name and value as a command on the shell prompt. For example, the following commands define and verify an …
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Mar 22, 2023 · So, for example, if you want to set them up globally, which is the most common use case, you would use the export command: export GLOBAL_VAR="/usr/raha/" If you would …
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Jan 7, 2024 · How to Set Environment Variables in Linux Using export Command. To set an environment variable, use the export command: export NAME=VALUE. For example, setting …
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Apr 21, 2021 · Use the following command to create a new shell variable. This will only make the variable active in your current session, but we will make an environment variable soon. Next, …
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Mar 13, 2025 · If you plan on using the command or any of the other set-ups described, consider adding these to your ~/.bashrc or ~/.profile or ~/.bash_profile script as appropriate.
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