which e.g. is used by the container engine rkt https://coreos.com/rkt/docs/latest/rkt-vs-other-projects.html#rkt-vs-systemd-nspawn https://coreos.com/rkt/docs/l

which e.g. is used by the container engine rkt https://coreos.com/rkt/docs/latest/rkt-vs-other-projects.html#rkt-vs-systemd-nspawn https://coreos.com/rkt/docs/latest/rkt-vs-other-projects.htm...