complete

The "complete" command line tool is used in Unix-like operating systems to define and manage command-line completion behavior. Completion allows users to efficiently and quickly enter commands by automatically suggesting or completing partially typed command names, options, file names, and other arguments.

The "complete" tool provides a way to customize and extend the default completion behavior in the shell environment. It allows users to define custom completion rules for specific commands, specify completion behavior based on context, and define aliases or abbreviations for command completion.

By using the "complete" command, users can enhance their productivity by reducing typing errors and speeding up command execution. It is particularly useful when working with frequently used or complex commands, scripts, or programs that have numerous options and arguments.