New Neo4j install: “No authorization header supplied” even after editing config file

I just installed Neo4j today to play around on my Ubuntu EC2 instance, and I'm having two problems. First, the ubuntu install did not create a neo4j command so I'm not able to issue commands from the cli. Second, when I try this sample command to add a node to the database, I get the error

curl -H "Accept: application/json; charset=UTF-8" -H "Content-Type: application/json" -X POST http://localhost:7474/db/data/cypher -d '{
  "query" : "CREATE (n:Person { name : {name} }) RETURN n",
  "params" : {
    "name" : "Foo"
  }
}'

I get this error:

{
  "errors" : [ {
    "message" : "No authorization header supplied.",
    "code" : "Neo.ClientError.Security.AuthorizationFailed"
  } ]

I read the docs here, and I modified the config file per these instructions:
http://neo4j.com/docs/stable/rest-api-security.html

I updated the config file so that it should not require authentication:

dbms.security.auth_enabled=false  

But still my curl requests to my localhost Neo4j server are blocked. All I can think is maybe neo4j needs a restart, but since I have no neo4j command, I can't use neo4j restart. I logged into the neo4j shell, but in the shell's list of commands there is no restart.

So my questions are:

(1) How can I restart neo4j?

(2) Where is my neo4j command/how can I create one following a standard ubuntu install?

(3) How could I create a username/password if I wanted to keep the access authentication in place?

Thanks.