There are two ways to set the language KDE uses in the messages it will display:

Yes, you can configure it using the KDE Control Center Regional & Accessibility Keyboard Layout configuration page.

First, you need to change to the “xdm runlevel” (runlevel 5 on Red Hat® and SuSE® systems) by editing your /etc/inittab file. In the file, you should have a line saying id:3:initdefault:. Change it to id:5:initdefault:. Now, at the end of the file, comment out the following line: x:5:respawn:/usr/bin/X11/xdm -nodaemon and replace it with x:5:respawn:/opt/kde/bin/kdm -nodaemon.

For changes to take effect immediately, type init 5 (for Red Hat® systems) at the shell prompt.

For FreeBSD, you should edit the file /etc/ttys and change one of the lines that look like

ttyv8   "/usr/X11R6/bin/xdm -nodaemon"  xterm   off secure

to instead say ttyv8 "/usr/local/bin/kdm -nodaemon" xterm off secure.

Open the KDE Control Center and choose Desktop->Behavior. You can now choose the behavior of mouse clicks on the desktop. To have the K menu open from a single left mouse button click, change the entry labeled Left button to say Application Menu.

Visit http://www.kde-look.org for a wide range of KDE themes and theming resources.

If you are using Konqueror, do this instead: first, open a Konqueror window and choose Settings->Configure Konqueror, then File Associations. Find the type you want to change (e.g. text/english or image/gif), and set the application preference order to whatever you want.

The login managersxdm and kdm do not run a login shell, so .profile, .bash_profile, etc. are not sourced. When the user logs in, xdm runs Xstartup as root and then Xsession as user. So the normal practice is to add statements in Xsession to source the user profile. Please edit your Xsession and .xsession files.

You need to install TrueType® font support into your X Window System® configuration. Please take a look at x.themes.org for the fonts, and xfsft: TrueType® Font Support For X11 or X-TrueType® Server Project Home Page for the font servers.

If you have a bunch of TrueType® fonts from Microsoft® Windows®, edit the XF86Config file to get the fonts from the font folder. Then just tell KDE to use these new fonts with the font administrator utility.

Yes and no. For details, look here: http://www.koffice.org/kword/euro.php.

There are many ways to do that. If what you want to do is to run some scripts that would set some environment variables (for example, to start gpg-agent, ssh-agent and others), you can put these scripts into $KDEHOME/env/ and make sure their names end in .sh. $KDEHOME is usually a folder named .kde (note the period at the beginning) in your home folder. If you want scripts to be executed for all KDE users, you can put them under $KDEDIR/env/, where $KDEDIR is the prefix KDE was installed to (you can find this out using the command kde-config --prefix).

If you wish to start a program after KDE has started, you may want to use the Autostart folder. To add entries to the Autostart folder:

To enable more than one user to log in at one time on the same computer (sometimes referred to as “fast user switching”) you need to tell the program that logs you in that it can use more than one session (or, in X Window System® terms, “display”) at a time.

In KDE, this program is called kdm which stands for “KDE Display Manager”. If you are not using kdm as your login screen then you will need to consult the documentation for the software you are using on how to accomplish multiple sessions.

By default, this will be configured at installation time automatically if kdm supports virtual terminals on your system (currently Linux only). If it was not configured automatically, consult the kdm manual, section Specifying permanent X-Servers. After modifying kdmrc, you will have to let kdm know about it; just invoke killall -HUP kdm.