apparmor prevents script from running on ubuntu

[oussamaosmani]

i had to run this to make it work

sudo sysctl kernel.apparmor_restrict_unprivileged_userns=0

[Thesola10]

I'll try to add a check+message for now, tested and at least I can read kernel.apparmor_restrict_unprivileged_userns as a regular user

will be part of an upcoming "environment check" module