open -- open files and directories

open [-e] [-t] [-f] [-F] [-W] [-R] [-n] [-g] [-h] [-b bundle_identifier] [-a application] file &helllip; [--args arg1 … ]

Opens a file (or a directory or URL), just as if you had double-clicked the file's icon.

If no application name is specified, the default application as determined via LaunchServices is used to open the specified files.

If the file is in the form of a URL, the file will be opened as a URL.

You can specify one or more file names (or pathnames), which are interpreted relative to the shell or Terminal window's current working directory. For example, the following command would open all Word files in the current working directory:
open *.doc

Opened applications inherit environment variables just as if you had launched the application directly through its full path. This behavior was also present in Tiger.

-a application application to use
-b bundle_indentifier
-e open with /Applications/TextEdit
-t open with the default text editor, as determined via LaunchServices
-f Reads input from standard input and opens the results in the default text editor. End input by sending EOF character (type Control- D). Also useful for piping output to open and having it open in the default text editor.
-F Opens the application "fresh," that is, without restoring windows. Saved persistent state is lost, except for Untitled documents.
-W wait until the applications (or that were already open) have exited.
Use with -n flag to allow open to function as an appropriate app for the $EDITOR environment variable.
-R Reveals the file(s) in the Finder instead of opening them.
-n Open a new instance of the application(s) even if one is already running.
-g Do not bring the application to the foreground.
-h Searches header locations for a header whose name matches the given string and then opens it.
Pass a full header name (such as NSView.h) for increased performance.
--args All remaining arguments are passed to the opened application in the argv parameter to main(). These arguments are not opened or interpreted by the open tool.
Open document in the default application for its type (as determined by LaunchServices).open '/Volumes/Macintosh HD/foo.txt'

open directory in the Finder: open '/Volumes/Macintosh HD/Applications/'

Open document in the application specified (TextEdit): open -a /Applications/ '/Volumes/Macintosh HD/foo.txt'

opens document using the bundle in this case, TextEdit). open -b '/Volumes/Macintosh HD/foo.txt'"

opens document in TextEdit. open -e '/Volumes/Macintosh HD/foo.txt'"

Write output of the 'ls' command to a file in /tmp and opens the file in the default text editor (as determined by LaunchServices). ls | open -f"

opens URL in the default browser. open

Open document in the default application for its type (as determined by LaunchServices). open 'file://localhost/Volumes/Macintosh HD/foo.txt'

Open a directory in the Finder: open 'file://localhost/Volumes/Macintosh HD/Applications/'

List headers whose names contain NSView and allows you to choose which ones to open: open -h NSView

Quickly open /System/Library/Frameworks/Foundation.framework/Headers/NSString.h in Xcode: open -a Xcode -h NSString.h