mod6@trb-test1 ~/starter_v $ command -v vdiff
/usr/bin/vdiff
mod6@trb-test1 ~/starter_v $ sha512sum ./vdiff /usr/bin/vdiff
64c8356d09c071df1923781443efc607741f9f43af787991fa7447a4034c24019f65e7c5698cdab17799e41695a9bb097a66bc12a5b81f7fab1160afc09d37d1  ./vdiff
64c8356d09c071df1923781443efc607741f9f43af787991fa7447a4034c24019f65e7c5698cdab17799e41695a9bb097a66bc12a5b81f7fab1160afc09d37d1  /usr/bin/vdiff
mod6@trb-test1 ~/starter_v $ gnat --version
GNAT GPL 2016 (20160515-49)
Copyright (C) 1996-2016, Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

mod6@trb-test1 ~/starter_v $ gprbuild --version
GPRBUILD GPL 2016 (20160515) (x86_64-pc-linux-gnu)
Copyright (C) 2004-2016, AdaCore
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

mod6@trb-test1 ~/starter_v $