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[Shell] Run and understand: Output the default environment variables

created-2025/12/12 updated-2026/03/24

Introduction

This repository uses the echo command to output the default environment variables set in the shell.

The commands you need to install

  1. None in paticular

Quickstart

Run the echo command to print the environment variables set in your shell.

ubuntu

echo $HOME
echo $PATH
Output results
The path should be output

macos

MacPorts

echo $HOME
echo $PATH
Output results
The path should be output

windows

WSL2

echo $HOME
echo $PATH
Output results
The path should be output

MSYS2 MINGW64

echo $HOME
echo $PATH
Output results
The path should be output

Procedure

ubuntu

Click to open details

Advance confirmation

Enter the following command into the terminal and if command not found does not appear, it is OK.

Nothing in paticular

preinstall

Please install the command that shows “command not found” in the terminal using the following command.

Nothing in paticular

command

Executing the following command in the terminal should output a string similar to the following:

echo $HOME
echo $PATH
Detail
The path should be output

macos

Click to open details

Advance confirmation

Enter the following command into the terminal and if command not found does not appear, it is OK.

Nothing in paticular

*MacOS uses the MacPorts package manager to manage commands. If you haven’t installed it yet, please refer to the MacPorts installation instructions at the link below. Also, set an alias for the command so that you can call the command without conflicting with the existing environment. If you are using this blog for the first time, please refer to the following two articles to set up your environment.

preinstall

If the command not found appears in the terminal, install it using the following command and set an alias.

Nothing in paticular

command

Executing the following command in the terminal should output a string similar to the following:

echo $HOME
echo $PATH
Detail
The path should be output

windows

Click to open details

Advance confirmation

Enter the following command into the prompt and if command not found does not appear, it’s OK.

WSL2
Nothing in paticular
MSYS2 MINGW64
Nothing in paticular

*Windows has been confirmed to work with WSL2 and MSYS2 MINGW64. Please install WSL2 if possible, and if you are unable to set it up, you can run it by installing MSYS2, but there may be some commands that can only be run in WSL2. Please refer to the following article for instructions on how to install WSL2 and MSYS2.

preinstall

If the command not found appears in the prompt, please install it using the following command.

WSL2
Nothing in paticular
MSYS2 MINGW64
Nothing in paticular

command

By executing the following command at the prompt, you should get the following output:

WSL2
echo $HOME
echo $PATH
Detail
The path should be output
MSYS2 MINGW64
echo $HOME
echo $PATH
Detail
The path should be output

Afterword

$HOME stores the path to the user name, and $PATH stores the search path for executable files. You can add the path specified with the export command.

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