KDED4(8)

✨ kded4(8) — the KDE daemon ✨

okay bestie, gather round, because we're talking about kded4, aka the KDE daemon, from the KDE User's Manual. she's the one who triggers Sycoca database updates when needed. 💅

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🎀 SYNOPSIS 🎀

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

🦋 DESCRIPTION 🦋

so kded4 is the queen responsible for creating the sycoca file, which is the binary cache of servicetypes, mimetypes, and services for a particular user. no cap. 🫶

she monitors the directories containing .desktop files. the second a file gets added or removed, she waits 5 seconds (just in case it's a whole series of updates, she's not dramatic like that), and then she launches kbuildsycoca4 to update the sycoca.

she also checks newly installed update files, i.e. the *.upd files used to update configuration files of users when the configuration file formats change. kconf_update gets launched to do the updates. lowkey iconic.

when the hostname changes, she'll make the necessary changes to the KDE environment and X-server so everything keeps working properly, launching kdontchangethehostname to do the changes. main character energy fr fr.

and bestie, those tasks are also performed always at kded4 start, to make sure the user configuration is up to date. 💖

she's 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.

the init modules can be enabled/disabled using systemsettings, in System Administration > Startup and Shutdown > Service Manager. iykyk. ✨

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💜 GENERIC OPTIONS 💜

• --author — show author information. 👑
• --help — show help about options.
• --help-all — show all the options, the whole buffet.
• --help-kde — show KDE specific options.
• --help-qt — show Qt specific options.
• --license — show license information.
• -v, --version — show version information.

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🌸 APPLICATION OPTIONS 🌸

• --check — check Sycoca database only once.

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🌈 USAGE 🌈

if kded4 is called without parameters and is already running, she shows the message:

KDE Daemon (kded) already running.

if kded4 is called with kded4 --check, then it updates the KDE sycoca using kbuildsycoca4. slay. 💅

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👀 SEE ALSO 👀

kdeoptions(7), qtoptions(7), kbuildsycoca4(8)

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💀 BUGS 💀

there are probably tons of bugs. use bugs.kde.org[1] to report them. not me being honest about it 🙈

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🫶 AUTHORS 🫶

• David Faure <faure@kde.org> — author.
• Waldo Bastian <bastian@kde.org> — author.

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🧚 NOTES 🧚

1. bugs.kde.org — http://bugs.kde.org

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okay that's the whole page bestie, go forth and let the daemon do her thing. this was KDE 4.5, dated 2010-10-28, and it's giving vintage but make it functional. periodt. 🎀💖✨