The xdg-utils package consists of set of tools to allow for easy integration with the desktop environment and also offers options for modifying and adding new MIME types.
sudo apt update -y sudo apt install -y xdg-utils
xdg-mime query filetype <name of the file>
xdg-mime query filetype 6285633006_R03C01_Red.idat
Adding custom MIME types is similar to the
mimetype utility: we can create the xml file and update the local database. Following our previous example, we will create the
<?xml version="1.0"?> <mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'> <mime-type type="application/vnd.binary"> <comment>Illumina proprietary IDAT format</comment> <glob pattern="*.idat"/> </mime-type> </mime-info>
shared-mime-info packages contains the core database of common MIME types and is utilized by both
mimetype. If run consecutively, changes made in the previous section for
mimetype will reflect with
xdg-mime without additional steps of adding custom types.
Update the database:
xdg-mime install illumina-idat.xml
Addition of custom MIME types in
xdg-mime are for current user by default when called by a non-root user while the changes are system wide when called by root. This behavior is controlled by the
--mode flag with either
system as arguments.
Revert to default
To revert back to the default MIME type use the
xdg-mime uninstall illumina-idat.xml
mimetypesrely on the shared-mime-info database for assigning MIME type, system wide changes will override local user related changes. If the uninstall command above does not revert to the default MIME type, a system wide uninstall can be run:
sudo xdg-mime uninstall --mode system illumina-idat.xml