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[cat] Run and understand. Correctly output spaces with the cat command

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

Introduction

This repository can run a program that runs the cat command to get a string from a file and correctly outputs a string with two spaces

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 shell script, and check what happens to the spaces in the string obtained with the cat command.

ubuntu

git clone https://github.com/trygfmi/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
Output results
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

macos

MacPorts

source ~/bashrc_folder/macports_alias
git clone https://github.com/trygfmi/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
Output results
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

windows

WSL2

git clone https://github.com/trygfmi/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
Output results
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

MSYS2 MINGW64

git clone https://github.com/trygfmi/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
Output results
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

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/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
detail
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

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/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
detail
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

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/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
detail
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png
MSYS2 MINGW64
git clone https://github.com/trygfmi/cat_doubleSpace
cd cat_doubleSpace
cat start_cat_doubleSpace.sh
chmod 755 start_cat_doubleSpace.sh
./start_cat_doubleSpace.sh
detail
/hello/cat/command/hello world/test string.png
/hello/cat/command/hello world/test  string.png

Afterword

The output will change depending on whether or not you add double quotes to $result. If you add double quotes, the space between test and string will be output as intended, like /hello/cat/command/hello world/test  string.png.

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