hadoop@whysoserious:/usr/local/lib/hadoop-2.7.3/etc/hadoop$ hdfs namenode -format
/usr/local/lib/hadoop-2.7.3/bin/hdfs: line 304: /usr/lib/jvm/java-8-oracle/jre/bin/java/bin/java: Not a directory
/usr/local/lib/hadoop-2.7.3/bin/hdfs: line 304: exec: /usr/lib/jvm/java-8-oracle/jre/bin/java/bin/java: cannot execute: Not a directory