# mcfly > A smart command history search and management tool. > Replaces your default shell history search (ctrl-r) with an intelligent search engine providing context and relevance to the commands. > More information: . - Print the mcfly integration code for the specified shell: `mcfly init {{bash|fish|zsh}}` - Search the history for a command, with 20 results: `mcfly search --results {{20}} "{{search_terms}}"` - Add a new command to the history: `mcfly add "{{command}}"` - Record that a directory has moved and transfer the historical records from the old path to the new one: `mcfly move "{{path/to/old_directory}}" "{{path/to/new_directory}}"` - Train the suggestion engine (developer tool): `mcfly train` - Display help for a specific subcommand: `mcfly help {{subcommand}}`