KDE System Administration/Environment Variables: Difference between revisions

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== Introduction ==
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There are numerous environment variables that are useful when managing and controlling a KDE environment. Supported environment variables are listed below.
 
== Automatically Set Variables ==
 
=== KDE_FULL_SESSION  ===
Set to true by KDE startup, it is used by e.g. Konqueror to know if it should consider remaining in memory for future re-use when being closed. If not set, konqueror will exit after being closed (e.g. kdesu does that, it's also useful for debugging).
== Display and Window Management ==
 
=== KDEWM ===
If the KDEWM environment variable has been set, then it will be used as KDE's window manager within the startkde script instead of kwin.
=== KDE_DISPLAY ===
An old(?) way to set DISPLAY for multihead.
=== KDE_MULTIHEAD ===
Set this variable to "true" to indicate that KDE is running on a multi-head system.
 
== File System ==
 
=== KDEDIRS ====
Overrides KDEDIR and allows you to specify multiple directories where KDE searches for its data. Useful if you want or have to install some programs to a different prefix than the rest of your KDE.
Please note, that at least the startkde script expects the KDE install directory to be listed as first.
=== KDEHOME ===
If not set, KDE uses ~/.kde as directory where your personal data is stored.
=== KDE_HOME_READONLY ===
Set this variable to indicate that your home directory is mounted as read-only.
 
=== KDEROOTHOME ===
If not set, KDE uses ~root/.kde as directory for root's personal data. Was introduced to prevent KDE from accidently overwriting user data with root permission when user run a KDE program after switching with "su" to root.
 
=== KDESYCOCA ===
Allows to specify the path and the name of the generated KDE system configuration cache file.
=== KDETMP ===
Allows to specify another path than /tmp where KDE stores its temporary files.
=== KDEVARTMP ===
Allows to specify another path than /var/tmp where KDE stores its variable files.
 
== Localization ==
 
=== KDE_LANG ===
Overrides the KDE language configuration, e.g. "KDE_LANG=fr kprogram &" starts a program with french translation if the necessary files are installed.
 
=== KDE_UTF8_FILENAMES ===
If this environment variable is set, KDE assumes all filenames are in UTF-8 encoding regardless of the current C locale.
 
== Networking ==
 
=== KDE_NO_IPV6 ===
Set this variable to disable IPv6 support / IPv6 DNS lookups.
 
=== KDE_USE_IDN ===
The content of this variable defines for which top level domains the usage of IDN is enabled. If not set, "at:ch:cn:de:dk:kr:jp:li:no:se:tw" will be used.
 
=== Performance Related ===
 
=== KDE_IS_PRELINKED ===
Set this variable to indicate that you have prelinked your KDE binaries and libraries.
=== KDE_MALLOC ===
If set to "1" the fast malloc routine provided in kdecore is used if KDE was compiled with --enable-fast-malloc, otherwise the libc's routine is used.
 
=== KDE_NOUNLOAD ===
If this variable is set then KLibLoader is told to never unload dynamically opened libraries.
=== KDE_DOUNLOAD ===
If this variable is set then KLibLoader is told to always try to unload dynamically opened libraries. Warning, this will most probably lead to crashes!
 
== Troubleshooting and Debugging ==
 
=== KDE_DEBUG ===
Set this variable to disable the KDE crash handler (same as --nocrashhandler command line option).
=== KDE_FORK_SLAVES ===
Set this variable to spawn KIO-slaves directly from the application process itself, by default KIO-slaves are spawned using klauncher/kdeinit. This option is useful if the KIO-slave should run in the same environment as the application, this can be the case with Clearcase.
== freedekstop.org Compliance ==
 
The following environment variables are defined in the [http://freedesktop.org/wiki/Standards/basedir-spec freedesktop.org base directory specification] and are supported by all XDG compliant environments and applications.
 
=== XDG_DATA_HOME ===
Defines the base directory relative to which user specific data files should be stored. If <tt>$XDG_DATA_HOME</tt> is either not set or empty, a default equal to {{path|$HOME/.local/share is used}}.
=== XDG_CONFIG_HOME ===
Defines the base directory relative to which user specific configuration files should be stored. If <tt>$XDG_CONFIG_HOME</tt> is either not set or empty, a default equal to {{path|$HOME/.config}} is used.
=== XDG_DATA_DIRS ===
Defines the preference-ordered set of base directories to search for data files in addition to the <tt>$XDG_DATA_HOME</tt> base directory. The directories in <tt>$XDG_DATA_DIRS</tt> should be separated with a colon ':'. If $XDG_DATA_DIRS is either not set or empty, a value equal to {{path|/usr/local/share/:/usr/share/}} is used.
=== XDG_CONFIG_DIRS ===
Defines the preference-ordered set of base directories to search for configuration files in addition to the <tt>$XDG_CONFIG_HOME</tt> base directory. The directories in <tt>$XDG_CONFIG_DIRS</tt> should be separated with a colon ':'. If $XDG_CONFIG_DIRS is either not set or empty, a value equal to {{path|/etc/xdg}} is used.

Latest revision as of 13:20, 11 March 2016

This page is now on the Userbase wiki.