README.md: Note userns unavailablity in CentOS 7 and Debian Jessie

Let's be more explicit that we can target production distributions
today.

Closes: #54
Approved by: rhatdan
This commit is contained in:
Colin Walters
2016-05-06 09:39:40 -04:00
committed by Colin Walters (automation)
parent cbbdaaab13
commit 4c18c78bf5

View File

@@ -16,7 +16,9 @@ There is an effort in the Linux kernel called
[user namespaces](https://www.google.com/search?q=user+namespaces+site%3Ahttps%3A%2F%2Flwn.net)
which attempts to allow unprivileged users to use container features.
While significant progress has been made, there are
[still concerns](https://lwn.net/Articles/673597/) about it.
[still concerns](https://lwn.net/Articles/673597/) about it, and
it is not available to unprivileged users in several production distributions
such as CentOS/Red Hat Enterprise Linux 7, Debian Jessie, etc.
See for example
[CVE-2016-3135](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3135)