To install file interperter in zeppelin

[zhengkai6]

How to install file interpreter in Zeppelin docker?
As described, I viewed the page http://zeppelin.apache.org/docs/0.7.2/manual/interpreterinstallation.html

And I exec the command:
./bin/install-interpreter.sh --name file

`root@020cfd6241f9:/usr/zeppelin# ./bin/install-interpreter.sh --name file
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/usr/zeppelin/lib/interpreter/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/zeppelin/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
Install file(org.apache.zeppelin:zeppelin-file:0.7.2) to /usr/zeppelin/interpreter/file ...
Interpreter file installed under /usr/zeppelin/interpreter/file.

1. Restart Zeppelin
2. Create interpreter setting in 'Interpreter' menu on Zeppelin GUI
3. Then you can bind the interpreter on your note
   `

I do not know how to Restart Zeppelin to make the file interpreter to effect?