[root@VM-4-17-centos /]# docker container exec -it wgcloud-server /bin/bash
root@0f4c02ebeb9d:/data# apt-get update && apt-get install iputils-ping
[root@VM-4-17-centos /]# docker container exec -it wgcloud-server /bin/bash
root@0f4c02ebeb9d:/data# ln -fs /bin/bash /bin/sh