Comment 12 for bug 1761997

Alex - I don't think that will work because when the new version of screen is unpacked the permissions are 755, so the check would need to be for 755, not 2755.

(xenial-amd64)root@impulse:/mnt/sec-machines# dpkg --unpack screen_4.6.2-1_amd64.deb
(Reading database ... 23570 files and directories currently installed.)
Preparing to unpack screen_4.6.2-1_amd64.deb ...
Unpacking screen (4.6.2-1) over (4.3.1-2build1) ...
Processing triggers for systemd (229-4ubuntu21.2) ...
Processing triggers for man-db (2.7.5-1) ...
(xenial-amd64)root@impulse:/mnt/sec-machines# stat -c%a /usr/bin/screen
755