How do you concatenate two files into a new file?

The correct way to concatenate two files into a new file is by using the command that employs the cat command. When executed as cat file1 file2 > newfile, this command reads the contents of file1 and file2 in sequence and directs the combined output into newfile. If newfile does not exist, it will be created; if it does exist, its content will be overwritten with the new combined content.

Using cat is a straightforward and commonly used method for file concatenation in Linux, making it an essential command to know. It allows for the efficient handling of file streams directly from the command line, facilitating easy management of file content.

The other options listed do not utilize the correct commands for concatenation. The join command, for example, is intended for joining lines of two files based on common fields instead of simple concatenation of their contents. The concept of a combine command does not exist in standard Linux utilities. Additionally, using a plus sign with cat is incorrect syntax in the context of concatenating files; thus, it would not fulfill the desired operation of creating a new file with combined content.