The correct answer is: cp
The cp command is used to copy files and directories. The syntax for the cp command is:
cp [options] source destination
The source is the file or directory that you want to copy, and the destination is the location where you want to copy the file or directory.
The -p option tells the cp command to preserve the permissions of the source file or directory.
The cpio command is used to copy files and directories, but it is more complex than the cp command. The syntax for the cpio command is:
cpio [options] [archive] [files]
The archive is the file that you want to create or update, and the files are the files that you want to copy to the archive.
The cp command is the most common way to copy files and directories. It is easy to use and understand, and it is supported by all versions of Linux.
The cpio command is more powerful than the cp command, but it is also more complex. It is used to copy files and directories, but it can also be used to create and extract archives.
The copy command is not a valid command in Linux.