`./bin/spark-shell --driver-memory 2g` => 
```
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -cp ::/Users/witgo/work/code/java/spark/dist/conf:/Users/witgo/work/code/java/spark/dist/lib/spark-assembly-1.0.0-SNAPSHOT-hadoop0.23.9.jar -Djava.library.path= -Xms512m -Xmx512m org.apache.spark.deploy.SparkSubmit spark-internal --driver-memory 2g --class org.apache.spark.repl.Main
```