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[shellscript] Run and understand. Receive the results of a shellscript

created-2025/11/13 updated-2026/03/15

Introduction

This repository runs a shellscript and uses the output of the shellscript to display the contents of a file

Commands that need to be installed

  1. git

Quickstart

If you have already installed the above command, run the following command to download it from the repository, then change the directory, run the shellscript, and display the contents of the filename received in the return value.

ubuntu

git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
Output results
hello shellscript

macos

MacPorts

source ~/bashrc_folder/macports_alias
git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
Output results
hello shellscript

windows

WSL2

git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
Output results
hello shellscript

MSYS2 MINGW64

git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
Output results
hello shellscript

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.

git --version

preinstall

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

sudo apt install git

command

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

git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
detail
hello shellscript

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.

source ~/bashrc_folder/macports_alias
git --version

※MacOS uses the MacPorts package manager to manage commands. If you haven’t installed it yet, please see the MacPorts installation instructions at the link below.

It also allows you to set aliases for commands so that you can call them without conflicting with existing environments.

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.

sudo port install git
echo 'alias git="/opt/local/bin/git"' >> ~/bashrc_folder/macports_alias

COMMAND

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

source ~/bashrc_folder/macports_alias
git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
detail
hello shellscript

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
git --version
MSYS2 MINGW64
git --version

※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
sudo apt install git
MSYS2 MINGW64
pacman --sync git

command

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

WSL2
git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
detail
hello shellscript
MSYS2 MINGW64
git clone https://github.com/trygfmi/shellscript_returnValue
cd shellscript_returnValue
chmod 744 printFileName.sh
chmod 744 start_shellscript_returnValue.sh
cat printFileName.sh
cat start_shellscript_returnValue.sh
./start_shellscript_returnValue.sh
detail
hello shellscript

Afterword

The key is to enclose the shell script in $(), like this: result=$(./printFileName.sh).
Since the received string is a filename, I passed it as an argument to the cat command to print its contents.

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