kded4 - Man Page

KDE daemon — triggers Sycoca database updates when needed.

Synopsis

kded4 [--help] [Generic options] [Qt-options] [KDE-options] [--check]

Description

kded4 is responsible for creating the sycoca file, i.e. the binary cache of servicetypes, mimetypes, and services for a particular user.

It monitors the directories containing .desktop files. When a file is added/removed, it waits 5 seconds (in case of a series of updates), and then launches kbuildsycoca4 to update the sycoca.

It checks newly installed update files, i.e. the *.upd files used to update configuration files of users when the configuration file formats changes. kconf_update is launched to do the updates.

When the hostname changes, it will make the necessary changes to the KDE environment and X-server to allow continued proper operation, launching kdontchangethehostname to do the changes.

Those tasks are also performed always at kded4 start to ensure that the user configuration is up to date.

It is also responsible for launching the on-demand kded4 modules and init enabled kded4 modules like:

Konqueror Browser Preloader: Reduces Konqueror startup time.
Directory Watcher: Monitors directories for changes.
Hardware Detection: Provides a user interface for hardware events.
SSL Certificate Policy: Provides the user configured SSL certificate policy to applications.
Network Proxy Configuration: Automatic proxy configuration.
Password Caching: Temporary password caching, for example: so that a webpage with HTTP authentication doesn't ask for your password for every link and every image in the page. These passwords are forgotten when exiting KDE (unlike KWallet)
Sound Policy: Provides the sound system policy to applications.
Favicons: Stores website icons.
Display Management: Manages displays and video outputs.
Cookie jar: Stores network cookies.
Network Watcher: Keeps track of the network and updates directory listings of the network:/ KIO slave.
Subversion Module: Provides various subversion actions to filemanager and other software.
Network Status: Tracks status of network interfaces and provides notifications for applications using the network.
Write Daemon: Watches the messages from local users sent with write(1) or wall(1).
Notification area watcher: Keeps track of applications that want to use the D-Bus based notification area.
KMixD: KMixD Mixer Service
Systemtray daemon: Keeps track of applications that want to use the D-Bus based system tray.
Keyboard Daemon: Keeps track of keyboard changes (new keyboard, changed layout)
Remote URL Change Notifier: Provides change notifications for network folders
Activity Manager: The Nepomuk activities manager backend
Display Management change monitor: Notifies how the display has been rotated (where available)
Free Space Notifier: Warns when running out of space in your home folder.
Removable Device Automounter: Automatically mounts devices as needed.
Nepomuk Search Module: Helper module for KIO to ensure automatic updates of Nepomuk search listings.
Power Management: Battery, Display and CPU power management and notifications.
K Remote Control Daemon: Manages the Remote Control commands received
Status Notifier Manager: Manages services that provide status notifier user interfaces.
DNS-SD Service Discovery Monitor: Monitors the network for DNS-SD services.
Drive Ejector: Automatically unmounts and releases drives when their eject button is pushed.
Time zone: Provides access to the system's time zones for applications.
Input Actions: Input Actions service performing configured actions on key presses.