docker进入容器内部执行命令

[root@bogon ~]# docker ps -l
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                               NAMES
38a2cae4c32f        jenkinsci/jenkins   "/sbin/tini -- /us..."   6 seconds ago       Up 5 seconds        50000/tcp, 0.0.0.0:8085->8080/tcp   jenkins
[root@bogon ~]# 
[root@bogon ~]# docker exec -it 38a2cae4c32f sh
$ su root
root@jenkins-7b46757695-4hx6f:/#