UNIX at SLAC
|Updated: 14 Mar 2008|
Whenever you get up and walk away from your computer without logging off, you should make sure your system is locked, i.e., requires you to type your password to resume your session. It is also highly desirable to obscure the contents of your screen, in case you have a window open displaying some data that should not be public. These functions are usually combined in a screensaver. Screensavers usually can be set to lock your computer automatically after some period of inactivity. This is a useful fallback in case you occasionally forget to activate the screensaver manually. However you should not just rely on the automatic timeout — get in the habit of activating the screensaver manually every time you walk away.
Here are instructions for configuring and activating the screensavers in the most popular UNIX desktop environments at SLAC.
To activate the screensaver, open the Actions menu (normally at the top of the screen) or the main menu (the red hat or footprint icon, normally at the bottom of the screen) and select Lock screen.
You can create a padlock icon on one of the panels at the top or bottom of the screen so that you can activate the screensaver with a single click. To do so, click on the Actions menu or main menu and drag the Lock screen entry to the desired location.
You can also create a keyboard shortcut to activate the screensaver:
The Gnome screensaver is named xscreensaver. You can invoke the configuration utility by opening the Actions menu or the main menu and selecting Preferences–>Screensaver; or by entering xscreensaver-demo on the command line.
There are a number of other settings for controlling the graphics displayed on the screen, etc. For details, click on the Help button or enter man xscreensaver-demo on the command line.
To activate the screensaver, open the K Menu (the red hat or letter 'K' icon, normally at the bottom left of the screen) and select Lock session; or right click on the desktop and select Lock session, near the bottom of the menu.
You can create a padlock icon on the panel, normally at the bottom of the screen, so that you can activate the screensaver with a single click. To do so, right click on the panel at the desired location and select Add–>Applet–>Lock/Logout Applet.
To invoke the configuration utility for the screensaver, open the K Menu and select Appearance & Themes–>Screen Saver in the index on the left. If you have added the Lock Applet to the panel, you can also right click it to open the configuration utility.
There are a number of other settings for controlling the graphics displayed on the screen, etc. For details, click on the Help tab or button (depending on how you opened the utility).
To activate the screensaver, click on the padlock icon in the middle of the CDE Front Pane, i.e., CDE's toolbar, usually found at the bottom of the screen.
You can also use the Screen Style Manager found in Desktop Controls to configure the screensaver, including the inactivity timeout. Any changes made here are for the current session only unless you then use the Startup Style Manager to Set Home Session, saving all of the characteristics of the session for the next login.