我安装了cloudera quickstart vm 5.13。我用的是sqoop。我试着执行下一个命令：

[cloudera@quickstart ~]$ sqoop list-tables --connect jdbc:oracle:thin:@localhost:1521:xe --username Guest1 --password G147

然后我有一个错误：

Warning: /usr/lib/sqoop/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
19/08/23 20:42:38 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.13.0
19/08/23 20:42:38 INFO oracle.OraOopManagerFactory: Data Connector for Oracle and Hadoop is disabled.
19/08/23 20:42:38 INFO manager.SqlManager: Using default fetchSize of 1000
19/08/23 20:42:39 ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.NullPointerException
java.lang.NullPointerException
        at org.apache.sqoop.manager.OracleManager.listTables(OracleManager.java:769)
        at org.apache.sqoop.tool.ListTablesTool.run(ListTablesTool.java:49)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)

我认为cloudera没有ojbdc驱动程序。
我该怎么办？我必须在哪里安装oracle ojdbc驱动程序？它叫什么名字？
研究：
1我已将ojdbc6.jar放在下一个目录中：

sudo cp /home/cloudera/Downloads/ojdbc6.jar /var/lib/sqoop/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /var/lib/sqoop2/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /var/lib/oozie/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/share/java/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/share/java/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/share/cmf/common_jars/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/share/cmf/cloudera-scm-telepub/jars/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/lib/sentry/lib/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/lib/hive/lib/ojdbc6.jar
sudo cp /home/cloudera/Downloads/ojdbc6.jar /usr/share/java/ojdbc6.jar

这是同样的错误。