minor number
UNIX uses this to associate a block special file or a character special file with a device driver.

mv
The command used to rename files.

nested loop
When a loop is located inside the body of another loop it is said to be nested within another loop.

newline character
Literally the linefeed character whose ASCII value is 10. In general, the newline character is a special shell character that indicates a complete command line has been entered and it may now be executed.

no-op
A command that does nothing and thus can be used as a dummy command or placeholder where syntax requires a command.

noninteractive mode
In noninteractive mode, the shell does not interact with you, rather it reads commands stored in a file and executes them. When it reaches the end of the file, the shell exits.

numeric expression
A command used to add, subtract, multiply, and divide two numbers. Numeric expressions are constructed using the numeric operators—+ (add), – (subtract), * (multiply), and / (divide).