Solution: chmod

---

• Create a second user sudo adduser foo
• Create the file and make it executable by owner and by group chmod ug+x hello.sh
• Create a new group: sudo groupadd exe
• Add my user (vagrant) to this group: sudo usermod -a -G exe vagrant
• Add the second user (foo) to the group: sudo usermod -a -G exe foo
• Change the group of the file to be the new common group: sudo chgrp exe hello.sh