# open > Opens files, directories and applications. - Open a file with the associated application: `open {{file.ext}}` - Run a graphical MacOSX application: `open /Applications/{{Application.app}}` - Open the current directory in Finder: `open .` - Reveal a file in finder: `open -R {{path/to/file}}` - Open all the files of a given extension in the current directory with the associated application: `open {{*.ext}}`