I remember years ago the behavior of groups in Solaris was quite different than in Linux or FreeBSD. Some standard functionality required running newgrp in orde

I remember years ago the behavior of groups in Solaris was quite different than in Linux or FreeBSD. Some standard functionality required running newgrp in order to be able to execute a file based on fs permissions. It was very annoying. This was 20ish years ago, so I have no idea what the behavior of now.