update

docker/docker.md

@@ -32,3 +32,9 @@ sudo systemctl daemon-reload
 sudo systemctl restart docker
 ```
 
+## login
+
+``` bash
+docker login registry.cn-hangzhou.aliyuncs.com
+```
+

mongodb/install.md

@@ -4,5 +4,6 @@
 
 ``` bash
 docker pull mongo
-docker run -p 27017:27017 -v /data/db:/data/db -d mongo:3.2
+docker run -p 27017:27017 -v /data/db:/data/db -d mongo --name=mongodb
+sudo docker exec -i -t  id /bin/bash
 ```