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-
-KDE GUI Login Configuration HOWTO
-
-
-
-----
-
-!!!KDE GUI Login Configuration HOWTO
-
-!!John P. Meshkoff, II
-johnm@sivakalpa.orgv0.03, 2002-05-22
-
-
-----
-''This is the KDE GUI Login Configuration HOWTO, a tutorial on customizing the GUI login screen. Topics include:
-How to add other window managers to the drop-down selection list;
-how to enable user selection icons in the login window;
-and requiring root permission for system shutdown.''
-----
-
-
-
-
-!!1. Copyright
-
-
-
-
-!!2. Introduction
-
-
-
-
-!!3. Adding new window manager selections to the drop-down list
-
-
-
-
-!!4. Enabling user selection icons in the login dialog box
-
-
-
-
-!!5. Requiring root permission for shutdown
-
-
-
-
-!!6. Bibliography
-----
-
-!!1. Copyright
-
-
-
-
-
-Copyright (c) 2002 by John Meshkoff
-
-
-Please freely copy and distribute (sell or give away) this document in any format. It's
-requested that corrections and/or comments be forwarded to the document maintainer. You
-may create a derivative work and distribute it provided that you:
-
-
-1. Send your derivative work (in the most suitable format such as sgml) to the LDP (Linux
-Documentation Project) or the like for posting on the Internet. If not the LDP, then let
-the LDP know where it is available.
-
-
-2. License the derivative work with this same license or use GPL. Include a copyright notice
-and at least a pointer to the license used.
-
-
-3. Give due credit to previous authors and major contributors.
-
-
-If you're considering making a derived work other than a translation, it's
-requested that you discuss your plans with the current maintainer.
-
-
-
-----
-
-!!2. Introduction
-
-
-This info is based on my !RedHat 6.1 default KDE Workstation installation. If you are using
-another distribution, or even another version of !RedHat, or a different Workstation install,
-then you may have to do some detective work. Hopefully, this info will give you what you need
-to start detecting! This HOWTO began as the result of wondering how to add another window manager
-or desktop environment to the drop-down list on the GUI login screen; further investigation
-revealed other configuration options.
-
-
-I began my own "detective work" when I found a reference on a !RedHat List which
-mentioned /etc/inittab, and its role in system startup. In
-/etc/inittab I found the following entries, which define how the
-X Window System is started in my distribution and version:
-
-
-
-
-----
-
-# Run xdm in runlevel 5
-# xdm is now a separate service
-x:5:respawn:/etc/X11/prefdm -nodaemon
-
-----
-
-
-
-Here is what prefdm looks like:
-
-
-
-
-----
-
-#!/bin/sh
-PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin
-# Run preferred X display manager
-preferred=
-if
[[ -f /etc/sysconfig/desktop
]; then
-if grep -q GNOME /etc/sysconfig/desktop 2>/dev/null; then
-preferred=gdm
-elif grep -q KDE /etc/sysconfig/desktop 2> /dev/null; then
-preferred=kdm
-elif grep -q !AnotherLevel /etc/sysconfig/desktop 2> /dev/null; then
-preferred=xdm
-fi
-fi
-if [[ -z ":$preferred" ]; then
-if which gdm >/dev/null 2>&1; then
-preferred=gdm
-elif which kdm >/dev/null 2>&1; then
-preferred=kdm
-elif which xdm >/dev/null 2>&1; then
-preferred=xdm
-fi
-fi
-if [[ -n "$preferred" ] && which $preferred >/dev/null 2>&1; then
-exec `which $preferred` $*
-fi
-exit 1
-
-----
-
-
-
-No changes to prefdm are necessary; it determines which display manager is the
-system default. During boot-up, prefdm parses /etc/sysconfig/desktop
-and selects the display manager listed there; in the case of my KDE Workstation
-install, this is kdm (KDE Display Manager). Note that gdm (Gnome Display Manager)
-is not installed on my system; xdm (X Display Manager) is installed by default as
-part of the X Window System, and was apparently used by older versions of Red Hat.
-
-
-
-----
-
-!!3. Adding new window manager selections to the drop-down list
-
-
-WARNING: The procedures explained in this HOWTO involve making changes to system
-configuration files; if you are not experienced in making such changes, some
-caution is required. Introducing errors into such files may make your system
-unstable, or cause it to crash. The procedures explained in this HOWTO have
-been tested and should not cause problems if used correctly.
-
-
-Do ''not'' use a ''word-processor'' program for editing system configuration
-files; such programs introduce special formatting characters which will corrupt the files.
-Use a ''text-editor'', particularly one which can handle long lines without introducing
-extra carriage-return or line feed characters into existing code. Suitable editors include
-vim (vi improved), vi, and emacs. There are others, but these are usually installed by default
-in Linux workstation installations; they each have features which make them especially suitable for
-writing and editing computer code. See the bibliography section at the end of this HOWTO for
-more information.
-
-
-IMPORTANT: Before making changes to ''any'' system configuration files, you should make
-back-up copies of the originals, so you can restore them in case of serious errors!
-
-
-The files which we will be changing
here are /usr/share/config/kdmrc, which
-is where we add selection labels to the drop-down list on the login screen, and
-/etc/X11/xdm/Xsession, which is where we add the path to the executables
-for our labels (if you are using a different distribution, the path to these
-files may be different; just do "locate kdmrc" and "locate Xsession"
-in the shell [[i.e., in a terminal emulation, such as ''xterm'', or KDE's ''konsole'']
-to find them).
-
-
-The default line to change in kdmrc looks like this:
-
-
-
-
-----
-
-!SessionTypes=kde;gnome;anotherlevel;default;failsafe;
-
-----
-
-
-
-After adding selection labels for two new window managers, windowmaker and blackbox, the line looks like this:
-
-
-
-
-----
-
-!SessionTypes=kde;gnome;windowmaker;blackbox;anotherlevel;default;failsafe;
-
-----
-
-Notice the positions where I have added the labels for the new window managers; all
-entries will appear on the drop-down list in the same order as they
-appear in the !SessionTypes list. Next, the actual choosing takes place in
-/etc/X11/xdm/Xsession. Here is what the appropriate section of
-Xsession looks like before adding the new entries:
-
-
-
-
-----
-
-# now, we see if xdm/gdm/kdm has asked for a specific environment
-#
-case $# in
-1)
-case $1 in
-failsafe)
-exec xterm -geometry 80x24--
-;;
-gnome)
-exec gnome-session
-;;
-kde)
-exec startkde
-;;
-anotherlevel)
-# we assume that switchdesk is installed.
-exec /usr/share/apps/switchdesk/Xclients.anotherlevel
-;;
-esac
-esac
-
-----
-
-
-
-
-
-
-Here is what this section of the Xsession file looks like after adding the new
-entries (NOTE that the selection labels ''must'' be ''exactly'' the
-same in Xsession and prefdm, i.e., spelling and case must be identical):
-
-
-
-
-----
-
-# now, we see if xdm/gdm/kdm has asked for a specific environment
-#
-case $# in
-1)
-case $1 in
-failsafe)
-exec xterm -geometry 80x24--
-;;
-gnome)
-exec gnome-session
-;;
-kde)
-exec startkde
-;;
-windowmaker)
-exec wmaker
-;;
-blackbox)
-exec blackbox
-;;
-anotherlevel)
-# we assume that switchdesk is installed.
-exec /usr/share/apps/switchdesk/Xclients.anotherlevel
-;;
-esac
-esac
-
-----
-
-Note that when the executables are installed in one of the paths shown below, only the
-executable name is required after "exec"; otherwise the full path must be included,
-as shown for "Xclients.anotherlevel" (above):
-
-
-/usr/bin/
-
-
-/usr/local/bin/
-
-
-/usr/X11R6/bin/
-
-
-/usr/bin/X11/
-
-
-These examples should be enough for you to add your favorite window manager(s) to the
-KDE graphical login, or to give you a starting point to find out how it's done in your
-particular installation.
-
-
-
-----
-
-!!4. Enabling user selection icons in the login dialog box
-
-
-In !RedHat 6.1, the default KDE login window shows a dialog box with a space to
-type in the user name, one in which to type the user password, and a drop down
-list to select the window manager/desktop environment of choice. By making the
-following changes to /usr/share/config/kdmrc, user icons will appear in
-the top of the login box.
-Here is what the default lines that control user icon view in kdmrc look like (other
-lines between these two are not shown, and are represented by "..."):
-
-
-
-
-----
-
-#Users=root;johndoe
-...
-!UserView=false
-
-----
-
-
-
-Here are the same lines after editing; delete the comment character ("#") in
-front of "Users=..." and change "johndoe" to your username (if there are more
-user accounts on your system, you may add their usernames here, separated by semi-colons
-as shown). Change "!UserView=false" to "!UserView=true" as shown here:
-
-
-
-
-----
-
-Users=root;johnpipe
-...
-!UserView=true
-
-----
-
-
-
-Now, when you login, you may click on an icon with the mouse to enter the user name; you must still type in your password.
-
-
-
-----
-
-!!5. Requiring root permission for shutdown
-
-
-The default for the shutdown button on the login box allows anyone to use it to shutdown the system.
-The section in /usr/share/config/kdmrc controlling who may use this button looks like this:
-
-
-
-
-----
-
-#!ShutdownButton=!RootOnly
-!ShutdownButton=!ConsoleOnly
-
-----
-
-
-
-To enable only the root user to shutdown the system, change the lines as shown below:
-
-
-
-
-----
-
-!ShutdownButton=!RootOnly
-#!ShutdownButton=!ConsoleOnly
-
-----
-
-
-
-Clicking the shutdown button will now prompt for the root password before shutting down the
-system.
-
-
-
-----
-
-!!6. Bibliography
-
-
-
-
-
-For more HOWTO's, see
-The Linux Documentation Project
-
-Recommended reading:
-
-
-
-
-
-*
-XWindow-User-HOWTO
-*
-
-*
-Emacs Beginner's HOWTO
-*
-
-*
-Vim Color Editor HOW-TO (Vi Improved with syntax color highlighting)
-*
-
-
-
-Depending on your Linux distribution and version, you may already have the
-above HOWTO's installed on your system
.
-----
+Describe
[HowToKDEGUILoginConfigurationHOWTO
] here.
