<pre>
$ sudo systemctl restart docker
</pre>
<pre>
$ docker run -i -t --rm ubuntu /bin/bash
</pre>
inet6 fe80::42:c5ff:fe9e:3ca1/64 scope link
valid_lft forever preferred_lft forever
</pre>
<pre>
$ docker run -i -t --rm ubuntu /bin/bash
root@42dcb495617c:/# apt update
root@42dcb495617c:/# apt install iproute2
</pre>