[cat] Run and understand Output variables as strings with heredocument

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

Nothing in paticular

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

Nothing in paticular

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

hello="hello here document world"
cat << 'EOF' > test.txt
$hello
EOF
 
cat test.txt

$hello

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.

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

Nothing in paticular

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

hello="hello here document world"
cat << 'EOF' > test.txt
$hello
EOF
 
cat test.txt

$hello

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.

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

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

WSL2

hello="hello here document world"
cat << 'EOF' > test.txt
$hello
EOF
 
cat test.txt

$hello

MSYS2 MINGW64

hello="hello here document world"
cat << 'EOF' > test.txt
$hello
EOF
 
cat test.txt

$hello