trying to understand problem

Makefile

@@ -71,6 +71,7 @@ deploy: all
 	cp practical_work/*.html phys/practical_work
 	cp practical_work/*.pdf phys/practical_work
 	ls -ltr
+	tar --version
 	cd practical_work/ && tar czvf tp_vec2.tar.gz tp_vec2/ && cp tp_vec2.tar.gz ../phys/practical_work
 	make -C practical_work/planets
 	cp practical_work/planets/*.pdf phys/planets/