source your enironment - meaning , and version compatibility
hello and thanks in advace, i read the tutorials for ros, and everything works, but i've got two questions. 1.what is the actual meaning of "source your enviornment"? 2.i find this page in the tutorial that is written for groovy distro, is it perfectly compatible for indigo with the change of groovy to indigo any place its written? here is the adress: wiki.rog.prg/catkin/tutorials/workspace_overlaying
thanks.
s