If you have multiple graphs set up and want to quickly switch between each without modifying dbms.active_database in conf/neo4j.conf,
you can accomplish this with a neo4j restart and with the environment variable NEO4J_CONF defined pointing to the appropriate/corresponding neo4j.conf file.
For example, one could define:
and where each directory has the same files, namely:
then upon restart of neo4j, it will then use the graph in the graph.db.test location.
Note: Be aware that the dbms.active_database setting in neo4j.conf is one of many settings that you may want/need to change.
If for example you do not change #dbms.directories.logs=logs then both conf files will result in each Neo instance
writing to $NEO4J_HOME/logs.