From Code Geeks
Create project from commandline with
mvn archetype:generate -DgroupId=com.javacodegeeks.ultimate -DartifactId=jpa -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false
Open sql commandline
java -cp ~/.m2/repository/com/h2database/h2/1.4.197/h2-1.4.197.jar org.h2.tools.Shell -url jdbc:h2:~/jpa