/run/screen has the following permissions
drwxrwxr-x 3 root utmp 60 Jul 19 06:06 screen
screen-cleanup is a masked service in response to bug 1462692, so the permissions of /run/screen are never changed in Ubuntu 16.04.
bdmurray@clean-xenial-amd64:~$ sudo service screen-cleanup status [sudo] password for bdmurray: ● screen-cleanup.service Loaded: masked (/dev/null; bad) Active: inactive (dead) bdmurray@clean-xenial-amd64:~$ ls -lh /lib/systemd/system/screen-cleanup.service lrwxrwxrwx 1 root root 9 Oct 4 2016 /lib/systemd/system/screen-cleanup.service -> /dev/null
/run/screen has the following permissions
drwxrwxr-x 3 root utmp 60 Jul 19 06:06 screen
screen-cleanup is a masked service in response to bug 1462692, so the permissions of /run/screen are never changed in Ubuntu 16.04.
bdmurray@ clean-xenial- amd64:~ $ sudo service screen-cleanup status cleanup. service clean-xenial- amd64:~ $ ls -lh /lib/systemd/ system/ screen- cleanup. service system/ screen- cleanup. service -> /dev/null
[sudo] password for bdmurray:
● screen-
Loaded: masked (/dev/null; bad)
Active: inactive (dead)
bdmurray@
lrwxrwxrwx 1 root root 9 Oct 4 2016 /lib/systemd/