1、通过管理平台分别停止组件服务和Cloudera Management Service
2、通过管理平台注销并移除Parcles （在控制台注销并移除，无论是安装的Parcles还是未安装的Parcles）
3、停止后台服务
sudo service cloudera-scm-agent stop
sudo service cloudera-scm-server stop
sudo service cloudera-scm-server-db stop
sudo service mysqld stop
4、卸载Cloudera Manager Server
执行命令：sudo /usr/share/cmf/uninstall-cloudera-manager.sh
5、清理配置和缓存信息
在所有agent上执行：sudo umount -v /var/run/cloudera-scm-agent/process
在所有主机上执行：sudo rm -rf /usr/share/cmf;
sudo rm -rf /var/lib/cloudera*;
sudo rm -rf /var/cache/yum/x86_64/6/cloudera*;
sudo rm -rf /var/log/cloudera*;
sudo rm -rf /var/run/cloudera* /etc/cloudera*
6、卸载rpm安装包
1）查看 rpm -qa | grep cloudera
2）卸载 for f in `rpm -qa | grep cloudera ` ; do sudo rpm -e ${f} ; done
7、清理安装文件
sudo rm -rf /var/lib/hadoop-* /var/lib/impala /var/lib/solr /var/lib/zookeeper /var/lib/hue /var/lib/oozie /var/lib/pgsql /var/lib/sqoop2 /data/dfs/ /data/impala/ /data/yarn/ /dfs/ /impala/ /yarn/ /var/run/hadoop-*/ /var/run/hdfs-*/ /usr/bin/hadoop* /usr/bin/zookeeper* /usr/bin/hbase* /usr/bin/hive* /usr/bin/hdfs /usr/bin/mapred /usr/bin/yarn /usr/bin/sqoop* /usr/bin/oozie /etc/hadoop* /etc/zookeeper* /etc/hive* /etc/hue /etc/impala /etc/sqoop* /etc/oozie /etc/hbase* /etc/hcatalog
略过其它软件，只删除hadoop相关
sudo rm -rf ` find /var/lib/alternatives/* ! -name "mta" ! -name "print" ! -name "zlibrary-ui" -mtime -3`
8、如果有hadoop先关进程还在，则杀死
for u in hdfs mapred cloudera-scm hbase hue zookeeper oozie hive impala flume; do sudo kill $(ps -u $u -o pid=); done
9、清理parcel
sudo rm -rf /opt/cloudera/parcel-cache /opt/cloudera/parcels
10、清理组件用户
sudo userdel hue;sudo userdel impala;sudo userdel spark;sudo userdel sentry;sudo userdel sqoop2;sudo userdel hbase;sudo userdel oozie;sudo userdel yarn;sudo userdel mapred;sudo userdel zookeeper;sudo userdel httpfs;sudo userdel solr;sudo userdel kms;sudo userdel hive;sudo userdel flume;sudo userdel hdfs;sudo userdel sqoop;sudo userdel llama;sudo userdel cloudera-scm;sudo userdel postgres;