[GRASS-user] problem whit raster images

GRASS GRASS user
,
1

hello everyone!

I'm still learning about grass world, i finally create a location, but i'm not sure about a few thing... Whatever i use r.in.gdal to import a .jpg map and it creates only map.1, map.2 and map.3 files; i tried visualized it and they were only gray images. Later i wanted to import a new image, but tis one was a .tif map, and it creates three new raster files, image.blue, image.red and image.green. This time when i wanted to visualize them grass mark the next error:

  'No socket to connect to for monitor <x0>'
    No graphics device selected

I wanted to know why r.in.gdal creates 3 files and what i have to do to visualize my map :S
please help
thank you so much.

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