#+Title: F.A.Q
#+Author: franck.cuny@gmail.com
#+TAGS: @twitter(t)
#+TAGS: ops linux tools

* IPMI                                                         :@twitter:ops:
#+BEGIN_SRC sh
ssh ipmibastion1.atla.twitter.com
console.sh <host>
#+END_SRC

More on the [[https://confluence.twitter.biz/display/DCE/IPMI%2BRemote%2BConsole%2Bconnectivity][wiki]].
* Linux                                                               :linux:
** Namespaces
*** List of containers on Mesos                              :@twitter:ops:
To get a list of containers on a host, you can run the following command:

#+BEGIN_SRC sh
ip netns list | xargs -I {} cat /proc/{}/cgroup | grep freezer | cut -f 3 -d '/'
#+END_SRC
*** Running netstat in a container                           :@twitter:ops:
On shared mesos, the network is divided in namespaces. Running =netstat= will not work, you need to use =ip netns= to be able to run =netstat= in a container. For example:

#+BEGIN_SRC sh
for c in $(ip netns); do echo $c && sudo ip netns exec $c netstat -ntp | grep 10.71.16.126; done
#+END_SRC