I have used the instructions here marked Tested 29/06/2018 to install QGIS 3.4.4 on Ubuntu 16.04. While QGIS installs nicely I get an error on installing qgis-plugin-grass. Subsequently the Grass tools listed in the processing window all throw errors.
Upon installation I get the following error...
The following packages have unmet dependencie: qgis-plugin-grass : Depends; grass760 but it is not installable. E: Unable to correct problems, you have held broken packages.
I have tried reinstalling using aptitude but this did not make any difference. How do I install the grass760 dependencies and qgis-plugin-grass?