Ubuntu Docker bash: ifconfig: command not found

$ sudo docker exec -it a5326cbabc6c /bin/bash

root@a5326cbabc6c:/# ifconfig

bash: ifconfig: command not found

root@a5326cbabc6c:/# ping

bash: ping: command not found

解决方法：

apt-get update

apt install iputils-ping

apt install net-tools