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Using the Kerberos Application on Mac OS X |
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This web page has instructions for the Kerberos application for Mac OS X.
Oct 31, 2013 This User Tip is designed for Mac's that are capable of running OS X Snow Leopard (10.6) to any Mac running OS X Lion (10.7) or Mountain Lion. (10.8) The Steps appear to work also in OS X Mavericks (10.9) at this time. Some words: The Steps are numbered, if instructed, then just jump to do that Step or run through them in a process of elimination. This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles.
These instructions reflect the Kerberos application on Mac OS X 10.3. While the Kerberos application is similar on previous OS X releases, not all features described below may be available or located in the same place.
MIT users should consult the Kerberos for Macintosh at MITdocumentation, which reflects the currently supported version.
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If you're not familiar with Kerberos authentication and terms such as Kerberos tickets, go to What Is Kerberos? to learn the concepts and terms. | |||||
| To open the Kerberos application: If you have installed the Mac OS X Kerberos Extras, go to the Applications folder, open the Utilities folder, and open the Kerberos icon. Otherwise, you will need to navigate to the /System/Library/CoreServices directory (use the Go To Folder... item in the Finder's Go menu), and open the Kerberos icon from there. (You may want to run the Kerberos Extras or make your own alias in a more convenient location.) Result: The Kerberos application window is displayed. | |||||
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| Below the Active User box and the Renew Tickets, Destroy Tickets, and Change Password buttons is the ticket list. The ticket list shows all the principals that are currently authenticated in the current Mac OS X user's session. Each principal has a set of Kerberos tickets belonging to it. When you log in with Kerberos, you get a ticket-granting ticket which then allows you to get other tickets from other applications (also called services). Then for each application you run that requires Kerberos authentication, you get a service ticket. By default, the principals and their tickets appear as a summary line in the ticket list. The summary lines are in bold text. Each summary line has three elements:
Instead of a time, you may see either 'expired' or 'not valid' in the Time Remaining column. 'Expired' means that your tickets have no time remaining and so are no longer valid; 'not valid' means they are no longer valid for some other reason, usually because your Mac's IP address has changed since you obtained the tickets. In either case, you need to renew your tickets (although Kerberos for Macintosh will also prompt you automatically to renew if you try to use a service requiring Kerberos tickets). If you want to see details of tickets associated with each principal, click on the triangle at the left of the principal's summary line. The list will expand: In the expanded list, you will see a list of the tickets (credentials) belonging to that principal. If the principal is authenticated for both versions of Kerberos, the tickets are grouped by version underneath a subheading for each version (see picture above). If you always want the ticket list to display expanded entries, you can set the 'Always expand new ticket list entries' preference. See the Changing preferences section. You can display even more detailed information about each ticket using the Ticket Info window. See the Displaying ticket information section. | |||||
| The current, active user specifies which Kerberos username will be used for authentication when you work with an application that requires Kerberos authentication. If more than one Kerberos user is logged in, you may want to change the active user before using such an application. Use one of the following techniques to change the active user:
Result: The new active user is displayed in the Active User box and also appears underlined in the ticket list. | |||||
| To destroy tickets, select the boldfaced username line in the ticket list then click on the Destroy Tickets button, or choose Destroy Tickets from the Tickets menu. Result: The ticket entry is removed from the ticket list. If other Kerberos users are logged in, their usernames remain in the ticket list and their tickets are valid for the remaining time indicated. | |||||
| If your tickets have expired, or you want to extend the lifetime of existing tickets, you may want to renew your tickets. As of Mac OS X 10.3, Kerberos for Macintosh supports the 'renewable' property for tickets. If your site allows tickets to have this property, you can renew tickets up for a set amount of time without re-entering your password, as long as your current tickets are still valid (that is, haven't expired). By default, Kerberos for Macintosh tries to get tickets with the 'renewable' property; you can change this in the Kerberos Login dialog options or in the Kerberos application preferences. In fact, by default, the Kerberos application will automatically attempt to renew your tickets if you leave it running (you can close the main window for convenience). Once half your ticket's lifetime has expired, if it has the 'renewable' property, the Kerberos application will automatically issue a renew request for it. It will keep doing this up until the renewable time limit. You can control this behavior by checking or unchecking the 'Auto-renew renewable tickets' checkbox in the Kerberos application preferences. You can see if a ticket is renewable, and for how long, by using the ticket information window. See Displaying ticket information below. If your tickets are expired, or you choose not to use the auto-renew feature and want to renew your tickets before they expire, or your tickets do not support the 'renewable' property, use the Renew Tickets command.
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| If you are interested in more information about your Kerberos tickets, the Kerberos application can display detailed information about each ticket by using the Get Ticket Info command. To display detailed ticket information:
Result: The Ticket Info window appears: At the top of the ticket info window is the principal who owns the ticket, the service that the ticket was obtained for, and the Kerberos version of the ticket. The rest of the information is divided into several panes for easier reading: You can have more than one ticket info window open at once. | |||||
| You can change your Kerberos password by using the Change Password... command. To change your password,
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| The Kerberos application's dock icon has several features to help you quickly determine the status of the active user's tickets and to manage your Kerberos tickets. Graphical ticket status & time remaining indicator
Kerberos Dock Menu
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| A default Kerberos realm is specified by the edu.mit.Kerberos configuration file (as distributed from MIT, this realm is ATHENA.MIT.EDU). When using the Kerberos application to log in, by default the Kerberos username and password entered are checked for authorization in this area of the network. You can add other realms, as described in this section, and change which one Kerberos Login uses by default. (For instructions on how to change the default realm, see Changing Preferences.) Other realms listed in the edu.mit.Kerberos configuration file can also be used for logging in, but must first be added to the list of 'favorite' realms which are displayed in the Kerberos Login dialog. You can do this one of two ways. First, you can type the realm you want directly into the Realm field/popup in the Kerberos Login dialog. This will only work if the realm is already in your Kerberos configuration file, or if your site is set up for auto/DNS resolution of Kerberos realms. If you are unsure if either of these are the case, or you try to add a realm this way and it doesn't work, consult your site administrator. Second, you can use the Edit Favorite Realms of the Kerberos application that provides the following options for making the other realms in the preferences available for use:
For information on adding new realm information to the Kerberos preferences file, see the Kerberos Preferences on Mac OS X Documentation. Kerberos for Macintosh does not provide a GUI way to add this information. Generally you should not have to do this, consult with your site administrator first! To add and remove realms,
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| You can make certain customizations to the Kerberos application by using the Preferences... command. These customizations also affect the Kerberos Login dialog anytime another application brings it up.
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Questions or comments? Send mail to macdev@mit.edu
Last updated on $Date: 2003/12/19 20:37:25 $
Last modified by $Author: smcguire $
To use a keyboard shortcut, press and hold one or more modifier keys and then press the last key of the shortcut. For example, to use Command-C (copy), press and hold the Command key, then the C key, then release both keys. Mac menus and keyboards often use symbols for certain keys, including modifier keys:
On keyboards made for Windows PCs, use the Alt key instead of Option, and the Windows logo key instead of Command.
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Some keys on some Apple keyboards have special symbols and functions, such as for display brightness , keyboard brightness , Mission Control, and more. If these functions aren't available on your keyboard, you might be able to reproduce some of them by creating your own keyboard shortcuts. To use these keys as F1, F2, F3, or other standard function keys, combine them with the Fn key.
Cut, copy, paste, and other common shortcuts
- Command-X: Cut the selected item and copy it to the Clipboard.
- Command-C: Copy the selected item to the Clipboard. This also works for files in the Finder.
- Command-V: Paste the contents of the Clipboard into the current document or app. This also works for files in the Finder.
- Command-Z: Undo the previous command. You can then press Shift-Command-Z to Redo, reversing the undo command. In some apps, you can undo and redo multiple commands.
- Command-A: Select All items.
- Command-F: Find items in a document or open a Find window.
- Command-G: Find Again: Find the next occurrence of the item previously found. To find the previous occurrence, press Shift-Command-G.
- Command-H: Hide the windows of the front app. To view the front app but hide all other apps, press Option-Command-H.
- Command-M: Minimize the front window to the Dock. To minimize all windows of the front app, press Option-Command-M.
- Command-O: Open the selected item, or open a dialog to select a file to open.
- Command-P: Print the current document.
- Command-S: Save the current document.
- Command-T: Open a new tab.
- Command-W: Close the front window. To close all windows of the app, press Option-Command-W.
- Option-Command-Esc: Force quit an app.
- Command–Space bar: Show or hide the Spotlight search field. To perform a Spotlight search from a Finder window, press Command–Option–Space bar. (If you use multiple input sources to type in different languages, these shortcuts change input sources instead of showing Spotlight. Learn how to change a conflicting keyboard shortcut.)
- Control–Command–Space bar: Show the Character Viewer, from which you can choose emoji and other symbols.
- Control-Command-F: Use the app in full screen, if supported by the app.
- Space bar: Use Quick Look to preview the selected item.
- Command-Tab: Switch to the next most recently used app among your open apps.
- Shift-Command-5: In macOS Mojave or later, take a screenshot or make a screen recording. Or use Shift-Command-3 or Shift-Command-4 for screenshots. Learn more about screenshots.
- Shift-Command-N: Create a new folder in the Finder.
- Command-Comma (,): Open preferences for the front app.
Sleep, log out, and shut down shortcuts
You might need to press and hold some of these shortcuts for slightly longer than other shortcuts. This helps you to avoid using them unintentionally.
- Power button: Press to turn on your Mac or wake it from sleep. Press and hold for 1.5 seconds to put your Mac to sleep.* Continue holding to force your Mac to turn off.
- Option–Command–Power button* or Option–Command–Media Eject : Put your Mac to sleep.
- Control–Shift–Power button* or Control–Shift–Media Eject : Put your displays to sleep.
- Control–Power button* or Control–Media Eject : Display a dialog asking whether you want to restart, sleep, or shut down.
- Control–Command–Power button:* Force your Mac to restart, without prompting to save any open and unsaved documents.
- Control–Command–Media Eject : Quit all apps, then restart your Mac. If any open documents have unsaved changes, you will be asked whether you want to save them.
- Control–Option–Command–Power button* or Control–Option–Command–Media Eject : Quit all apps, then shut down your Mac. If any open documents have unsaved changes, you will be asked whether you want to save them.
- Control-Command-Q: Immediately lock your screen.
- Shift-Command-Q: Log out of your macOS user account. You will be asked to confirm. To log out immediately without confirming, press Option-Shift-Command-Q.
* Does not apply to the Touch ID sensor.
Finder and system shortcuts
- Command-D: Duplicate the selected files.
- Command-E: Eject the selected disk or volume.
- Command-F: Start a Spotlight search in the Finder window.
- Command-I: Show the Get Info window for a selected file.
- Command-R: (1) When an alias is selected in the Finder: show the original file for the selected alias. (2) In some apps, such as Calendar or Safari, refresh or reload the page. (3) In Software Update preferences, check for software updates again.
- Shift-Command-C: Open the Computer window.
- Shift-Command-D: Open the desktop folder.
- Shift-Command-F: Open the Recents window, showing all of the files you viewed or changed recently.
- Shift-Command-G: Open a Go to Folder window.
- Shift-Command-H: Open the Home folder of the current macOS user account.
- Shift-Command-I: Open iCloud Drive.
- Shift-Command-K: Open the Network window.
- Option-Command-L: Open the Downloads folder.
- Shift-Command-N: Create a new folder.
- Shift-Command-O: Open the Documents folder.
- Shift-Command-P: Show or hide the Preview pane in Finder windows.
- Shift-Command-R: Open the AirDrop window.
- Shift-Command-T: Show or hide the tab bar in Finder windows.
- Control-Shift-Command-T: Add selected Finder item to the Dock (OS X Mavericks or later)
- Shift-Command-U: Open the Utilities folder.
- Option-Command-D: Show or hide the Dock.
- Control-Command-T: Add the selected item to the sidebar (OS X Mavericks or later).
- Option-Command-P: Hide or show the path bar in Finder windows.
- Option-Command-S: Hide or show the Sidebar in Finder windows.
- Command–Slash (/): Hide or show the status bar in Finder windows.
- Command-J: Show View Options.
- Command-K: Open the Connect to Server window.
- Control-Command-A: Make an alias of the selected item.
- Command-N: Open a new Finder window.
- Option-Command-N: Create a new Smart Folder.
- Command-T: Show or hide the tab bar when a single tab is open in the current Finder window.
- Option-Command-T: Show or hide the toolbar when a single tab is open in the current Finder window.
- Option-Command-V: Move the files in the Clipboard from their original location to the current location.
- Command-Y: Use Quick Look to preview the selected files.
- Option-Command-Y: View a Quick Look slideshow of the selected files.
- Command-1: View the items in the Finder window as icons.
- Command-2: View the items in a Finder window as a list.
- Command-3: View the items in a Finder window in columns.
- Command-4: View the items in a Finder window in a gallery.
- Command–Left Bracket ([): Go to the previous folder.
- Command–Right Bracket (]): Go to the next folder.
- Command–Up Arrow: Open the folder that contains the current folder.
- Command–Control–Up Arrow: Open the folder that contains the current folder in a new window.
- Command–Down Arrow: Open the selected item.
- Right Arrow: Open the selected folder. This works only when in list view.
- Left Arrow: Close the selected folder. This works only when in list view.
- Command-Delete: Move the selected item to the Trash.
- Shift-Command-Delete: Empty the Trash.
- Option-Shift-Command-Delete: Empty the Trash without confirmation dialog.
- Command–Brightness Down: Turn video mirroring on or off when your Mac is connected to more than one display.
- Option–Brightness Up: Open Displays preferences. This works with either Brightness key.
- Control–Brightness Up or Control–Brightness Down: Change the brightness of your external display, if supported by your display.
- Option–Shift–Brightness Up or Option–Shift–Brightness Down: Adjust the display brightness in smaller steps. Add the Control key to this shortcut to make the adjustment on your external display, if supported by your display.
- Option–Mission Control: Open Mission Control preferences.
- Command–Mission Control: Show the desktop.
- Control–Down Arrow: Show all windows of the front app.
- Option–Volume Up: Open Sound preferences. This works with any of the volume keys.
- Option–Shift–Volume Up or Option–Shift–Volume Down: Adjust the sound volume in smaller steps.
- Option–Keyboard Brightness Up: Open Keyboard preferences. This works with either Keyboard Brightness key.
- Option–Shift–Keyboard Brightness Up or Option–Shift–Keyboard Brightness Down: Adjust the keyboard brightness in smaller steps.
- Option key while double-clicking: Open the item in a separate window, then close the original window.
- Command key while double-clicking: Open a folder in a separate tab or window.
- Command key while dragging to another volume: Move the dragged item to the other volume, instead of copying it.
- Option key while dragging: Copy the dragged item. The pointer changes while you drag the item.
- Option-Command while dragging: Make an alias of the dragged item. The pointer changes while you drag the item.
- Option-click a disclosure triangle: Open all folders within the selected folder. This works only when in list view.
- Command-click a window title: See the folders that contain the current folder.
- Learn how to use Command or Shift to select multiple items in the Finder.
- Click the Go menu in the Finder menu bar to see shortcuts for opening many commonly used folders, such as Applications, Documents, Downloads, Utilities, and iCloud Drive.
Document shortcuts
The behavior of these shortcuts may vary with the app you're using.
- Command-B: Boldface the selected text, or turn boldfacing on or off.
- Command-I: Italicize the selected text, or turn italics on or off.
- Command-K: Add a web link.
- Command-U: Underline the selected text, or turn underlining on or off.
- Command-T: Show or hide the Fonts window.
- Command-D: Select the Desktop folder from within an Open dialog or Save dialog.
- Control-Command-D: Show or hide the definition of the selected word.
- Shift-Command-Colon (:): Display the Spelling and Grammar window.
- Command-Semicolon (;): Find misspelled words in the document.
- Option-Delete: Delete the word to the left of the insertion point.
- Control-H: Delete the character to the left of the insertion point. Or use Delete.
- Control-D: Delete the character to the right of the insertion point. Or use Fn-Delete.
- Fn-Delete: Forward delete on keyboards that don't have a Forward Delete key. Or use Control-D.
- Control-K: Delete the text between the insertion point and the end of the line or paragraph.
- Fn–Up Arrow: Page Up: Scroll up one page.
- Fn–Down Arrow: Page Down: Scroll down one page.
- Fn–Left Arrow: Home: Scroll to the beginning of a document.
- Fn–Right Arrow: End: Scroll to the end of a document.
- Command–Up Arrow: Move the insertion point to the beginning of the document.
- Command–Down Arrow: Move the insertion point to the end of the document.
- Command–Left Arrow: Move the insertion point to the beginning of the current line.
- Command–Right Arrow: Move the insertion point to the end of the current line.
- Option–Left Arrow: Move the insertion point to the beginning of the previous word.
- Option–Right Arrow: Move the insertion point to the end of the next word.
- Shift–Command–Up Arrow: Select the text between the insertion point and the beginning of the document.
- Shift–Command–Down Arrow: Select the text between the insertion point and the end of the document.
- Shift–Command–Left Arrow: Select the text between the insertion point and the beginning of the current line.
- Shift–Command–Right Arrow: Select the text between the insertion point and the end of the current line.
- Shift–Up Arrow: Extend text selection to the nearest character at the same horizontal location on the line above.
- Shift–Down Arrow: Extend text selection to the nearest character at the same horizontal location on the line below.
- Shift–Left Arrow: Extend text selection one character to the left.
- Shift–Right Arrow: Extend text selection one character to the right.
- Option–Shift–Up Arrow: Extend text selection to the beginning of the current paragraph, then to the beginning of the following paragraph if pressed again.
- Option–Shift–Down Arrow: Extend text selection to the end of the current paragraph, then to the end of the following paragraph if pressed again.
- Option–Shift–Left Arrow: Extend text selection to the beginning of the current word, then to the beginning of the following word if pressed again.
- Option–Shift–Right Arrow: Extend text selection to the end of the current word, then to the end of the following word if pressed again.
- Control-A: Move to the beginning of the line or paragraph.
- Control-E: Move to the end of a line or paragraph.
- Control-F: Move one character forward.
- Control-B: Move one character backward.
- Control-L: Center the cursor or selection in the visible area.
- Control-P: Move up one line.
- Control-N: Move down one line.
- Control-O: Insert a new line after the insertion point.
- Control-T: Swap the character behind the insertion point with the character in front of the insertion point.
- Command–Left Curly Bracket ({): Left align.
- Command–Right Curly Bracket (}): Right align.
- Shift–Command–Vertical bar ( ): Center align.
- Option-Command-F: Go to the search field.
- Option-Command-T: Show or hide a toolbar in the app.
- Option-Command-C: Copy Style: Copy the formatting settings of the selected item to the Clipboard.
- Option-Command-V: Paste Style: Apply the copied style to the selected item.
- Option-Shift-Command-V: Paste and Match Style: Apply the style of the surrounding content to the item pasted within that content.
- Option-Command-I: Show or hide the inspector window.
- Shift-Command-P: Page setup: Display a window for selecting document settings.
- Shift-Command-S: Display the Save As dialog, or duplicate the current document.
- Shift–Command–Minus sign (-): Decrease the size of the selected item.
- Shift–Command–Plus sign (+): Increase the size of the selected item. Command–Equal sign (=) performs the same function.
- Shift–Command–Question mark (?): Open the Help menu.
Other shortcuts
For more shortcuts, check the shortcut abbreviations shown in the menus of your apps. Every app can have its own shortcuts, and shortcuts that work in one app might not work in another.
- Apple Music shortcuts: Choose Help > Keyboard shortcuts from the menu bar in the Music app.
- Other shortcuts: Choose Apple menu > System Preferences, click Keyboard, then click Shortcuts.
Learn more
- Create your own shortcuts and resolve conflicts between shortcuts
- Change the behavior of the function keys or modifier keys