Description: A here document in Bash is a type of redirection that allows multiple lines of input to be passed to a command. This technique is used to facilitate data input in scripts and terminal commands, allowing the user to write a block of text that can be processed as if it were a file. The basic syntax of a here document starts with ‘<<' followed by a delimiter, which can be any word or symbol chosen by the user. The content to be passed to the command is then written, and the block is terminated with the same delimiter. This functionality is particularly useful in situations where complex data or multiple lines of text need to be provided without creating a temporary file. Additionally, here documents can include variables and commands, making them a powerful tool for automation and data manipulation in scripting environments. Their use has become common in script programming, facilitating user interaction and data management more efficiently.
