GRASS GIS 8.2.1 Reference Manual: Topic buffer

Topic: buffer

r.buffer	Creates a raster map showing buffer zones surrounding cells that contain non-NULL category values.
r.buffer.lowmem	Creates a raster map showing buffer zones surrounding cells that contain non-NULL category values.
r.circle	Creates a raster map containing concentric rings around a given point.
v.buffer	Creates a buffer around vector features of given type.

See also the corresponding keyword buffer for additional references.