Unable to access the database


I tried to do exercises demonstrated on YouTube class for Spark and used cd /data/retail-db using my username and password on Itversity.com. It gave an error that there is no such directory. Can you please help so that I can finish the exercises?

Common issues we encounter on our state of the art Big Data Cluster with Hadoop, Spark and many others - https://labs.itversity.com

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Its cd /data/retail_db and not cd /data/retail-db

underscore and not dash