How to add references / edit formatting on stackoverflow/segfault/...

I had to go looking for this today and couldn't find it immediately so I'm putting it here so I might find it faster next time. http://meta.stackoverflow.com/editing-help

How to add references:

Here's a link to [a blog on Linux networking namespaces][nsblog]. And here's another link to the same thing: [opencloudblog.com: Linux networking namespaces shiny and more beautiful].

  [opencloudblog.com: Linux networking namespaces shiny and more beautiful]:http://www.opencloudblog.com/?p=42
   [blog]: http://www.opencloudblog.com/?p=42

From
http://superuser.com/questions/428694/creating-a-new-network-namespace-on-linux
http://stackoverflow.com/questions/25641630/virtual-networking-devices-in-linux/26058531#26058531

See also introduction to linux virtual networking: [blog.scottlowe.org: Linux networking namespaces intro], [opencloudblog.com: Linux networking namespaces shiny and more beautiful] and [opencloudblog.com: Linux networking namespaces shiny and even more detailed with beautiful diagrams]

[man ip netns]: http://man7.org/linux/man-pages/man8/ip-netns.8.html
[LWN article on network namespaces]: http://lwn.net/Articles/580893/
[blog.scottlowe.org: Linux networking namespaces intro]: http://blog.scottlowe.org/2013/09/04/introducing-linux-network-namespaces/
[opencloudblog.com: Linux networking namespaces shiny and more beautiful]: http://www.opencloudblog.com/?p=42
[opencloudblog.com: Linux networking namespaces shiny and even more detailed with beautiful diagrams]: http://www.opencloudblog.com/?p=66