Congratulations on passing Linux Essentials. To transition into Big Data certification you have multiple options depending on your interests. If you are skilled with Linux administration, a Hadoop administration certification offered by Hortonworks(HDPCA) is your best choice which includes building and managing Hadoop clusters. If you also have development experience with languages like Java, Python, SQL etc a Hortonworks developer certification (HDPCD), Cloudera CCP Data Engineer or CCA Spark and Hadoop Developer is suitable for you.
Good luck in your journey!