All European users of almost any operating system have two problems: The first is to tell the computer that you have a non-American keyboard, and the second is to get the computer to display the special characters. To make matters worse the applications themselves will also consider you an exception if you are not an American and require special options or the setting of environment variables.
Under Linux you change the way your computer interprets the
keyboard with the commands loadkeys and xmodmap. loadkeys
will modify the keyboard for plain Linux while xmodmap makes the
modifications necessary when the handshaking between X11 and Linux is
imperfect.
To display the characters you need to tell your applications that you use the ISO-8859-1 (a.k.a. Latin-1) international set of glyphs. This is not always necessary, but a number of key applications need special attention.
This HOWTO is intended to tell Danish users how to do this. If you continue to have troubles after reading this you can try the German HOWTO, the Keystroke mini-HOWTO or the ISO 8859-1 FAQ. Many of the hints contained herein are cribbed from there. See section Other documents of relevance for pointers to these documents. You should also send me a mail describing your troubles.
A final problem is that error-messages, menus and documentation of
applications are always in English. There's a GNU project under way to
address this problem. You can see what it's all about by downloading
the file ABOUT-NLS or the package gettext-0.10.tar.gz (or any
later version) from your favourite mirror of prep.ai.mit.edu. This
project needs volunteers for the translations. Send a mail to
da-request@li.org with the body ``subscribe'' if you want to contribute
to the Danish part of the project. The documentation in the gettext
package describes how to use such translations in your own programs.