The utility used to create a new directory in Linux is "mkdir".

For example, to create a directory named new_directory, you would use: mkdir new_directory

Explanation of the options provided:

• touch: This command is used to create empty files, not directories.
• echo: This command is used to display text or to redirect output, not for creating directories.
• mkdir: This is the correct command to create a new directory in Linux.
• cd: This command is used to change the current directory, not to create new directories.