# &kde; User's Manual

`kded4`

8

`kded4`

&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 series of updates), and then launches `kbuildsycoca4`.

## Generic Options

`--author`

- Show author information.

`--help`

- Show help about options.

`--help-all`

- Show all options.

`--help-kde`

- Show KDE specific options.

`--help-qt`

- Show Qt specific options.

`--license`

- Show license information.

`-v` `--version`

- Show version information

## Application Options

`--check`

- Check Sycoca database only once.

## Usage

If `kded4` is called without parameters and is already running, it shows the message:

    KDE Daemon (kded) already running.

If `kded4` is called with `kded4 --check`, then it updates the &kde; sycoca using `kbuildsycoca4`.

## See Also

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

## Bugs

There are probably tons of bugs. Use bugs.kde.org to report them.