Install qgis-plugin-grass by entering the following commands in the terminal:
sudo apt update sudo apt install qgis-plugin-grass
Description:
GRASS plugin for QGIS
QGIS is a Geographic Information System (GIS) which manages, analyzes and display databases of geographic information. . This plugin enables GRASS data access in QGIS.
Homepage: https://qgis.org/
Version: 2.18.17+dfsg-1
Section: universe/science