Bash Here documents and here strings Create a file
Example
A classic use of here documents is to create a file by typing its content:
cat > fruits.txt << EOF
apple
orange
lemon
EOF
The here-document is the lines between the << EOF and EOF.
This here document becomes the input of the cat command.
The cat command simply outputs its input,
and using the output redirection operator > we redirect to a file fruits.txt.
As a result, the fruits.txt file will contain the lines:
apple
orange
lemon
The usual rules of output redirection apply:
if fruits.txt did not exist before, it will be created.
If it existed before, it will be truncated.
