commandliners

A here document is a way to define a literal string preserving the space, new line characters, etc. It is used with the << redirection operator and it needs a delimiter token. Let’s see an example:

$ cat << _END >file
> This is
> a multiline
> string
> _END
$ cat file
This is
a multiline
string

I used _END as delimiter, but you can use whatever you want (endOfDocument, _EOF_, etc)