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SUSE Linux Enterprise Desktop Deployment Guide
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10.2 Managing Profiles Manually

If you prefer manually editing configuration files over using a graphical tool, the KIOSK framework lets you do this, too. Every configuration file in a profile is a plain text file that can be edited with the editor of your choice. KIOSK's configuration and deployment options are described in detail in The KDE Source Repository at https://websvn.kde.org/trunk/KDE/kdelibs/kdecore/README.kiosk?view=markup. Refer to this resource for details. In the following, only the fundamentals needed to use the KIOSK framework are described.

10.2.1 File System Hierarchy

KDE reads and stores files used by the KDE environment itself as well as by the KDE applications in fixed directory trees, also referred to as profiles in this context. By default, there are two such directories: /opt/kde3 and ~/.kde. The ~/.kde directory contains the user-specific settings. The /opt/kde3 directory contains data and configuration files that came with the packages. It is not recommended to make any changes there, because they get overwritten with the next update. Therefore, as a system administrator you can create additional trees that are used by the KIOSK framework. The default location for an additional fixed directory tree is /var/lib/kde-profiles. You can add custom locations in /etc/kde3rc. Refer to the KIOSK documentation for details.

A fixed directory tree consists of the following directories (although not all directories need to be present):

bin

Executables

cgi-bin

Help center scripts

lib

Libraries

socket-<HOSTNAME>

Communication sockets

tmp-<HOSTNAME>

Temporary files

cache-<HOSTNAME>

Cached data

share

Application and configuration data

Among others, the share directory contains the following subdirectories:

share/applications

.desktop files for all applications appearing in the KDE menu

share/applnk

The KDE menu structure

share/config

Configuration files for applications and components as well as the global configuration file kdeglobals

share/icons

Icons, categorized by theme, dimension, and usage category

share/mimelnk

.desktop files with mime types

share/wallpapers

Images that can be used as background pictures

Precedence

KDE scans all directory trees known to the system. When a specific file is present in multiple directory trees, the order of precedence determines which file is used.

When configuration files are scanned, an additional rule applies. Generally, the contents of multiple configuration files with the same name are merged. However, if the same configuration key is defined more than once, the key from the file with the highest precedence determines which value is used.

The rule of precedence is:

  1. User directory (~/.kde)

  2. Directories configured in /etc/kde3rc

  3. Systemwide default directory (/opt/kde3)

As a user, you can overwrite this order by setting the variable $KDEDIRS. Directories should be separated by a colon (:). The first directory has highest precedence and the last one lowest precedence.

10.2.2 Configuration File Format

KDE configurations are stored in text files in UTF-8 format. Each configuration option consists of a key and value pair and is placed inside a group:

[Group 1]
  key=value
  key 2=value 2

White space at the beginning or end of keys and values are ignored. However, both may contain spaces as shown in the example above. If a value is supposed to start or end with space or should contain line breaks or special characters, use the following special codes:

  • \s: space

  • \t: tab

  • \r: carriage return

  • \n: new line

  • \\: backslash

Shell Expansion

To use dynamically generated values, KDE allows you to use shell expansions. If a key is followed by [$e], shell expansions are activated. When using this construct, the value is written to the file the first time it is read. Using [$ie], lock down this behavior so the expansion is evaluated every time the configuration file is read. Shell expansions allow you to either use environment variables or the output of commands as values.

[example group]
  UserName=$USER
  Group=$(id -g)
  HomeDirectory=$HOME

Localization

All configuration values can be localized with a language code added to the key entry:

[example group]
  Label=Language
  Label[de]=Sprache
  Label[ru]=Язык

Configuration Entry Lock Down

All configuration entries can be protected from being overwritten. You can lock down entire configuration files, groups, or individual keys. Do this by adding [Si] on a separate line at the beginning of a file, placing it behind the group name, or adding it behind a key.

[example group][$i]
  Label=Language

[example group 2]
  UserName[$i]=$USER

10.2.3 Activating Profiles

Profiles can be created anywhere in the file system. To make the KDE environment read your profiles, you must make them known to the system in /etc/kde3rc. The default profile location /var/lib/kde-profiles/ is already configured there.

By default, a custom profile is not associated to users or groups. You can make this association in the user profile map file at /etc/kde-user-profile. The only exception from this is the default profile. If you create a profile named default under /var/lib/kde-profiles/ this is automatically associated to all users on this machine (such a profile does not exist by default).

Find more detailed information about activating profiles and mapping them to users in the KIOSK framework documentation.

10.2.4 Examples

SUSE Linux Enterprise comes with three predefined profiles (redmond, simplified, and Thinclient) located in /var/lib/kde-profiles. You may use one of these as a template for your own profile.

SUSE Linux Enterprise Desktop Deployment Guide
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