年少无知，安装了1.2.0版本。开源社区动力太强，更新的吼吼的跟不上啊，升级发生错误，于是就想重装了。在网上找到了一个很好的删除脚本，分享一下。原文链接 http://www.cnblogs.com/cenyuhai/p/3287855.html

#1.删除hdp.repo和hdp-util.repo

cd /etc/yum.repos.d/

rm -rf hdp*

rm -rf HDP*

rm -rf ambari*

#2.删除安装包

#用yum list installed | grep HDP来检查安装的ambari的包

yum remove -y  sqoop.noarch

yum remove -y  lzo-devel.x86_64

yum remove -y  hadoop-libhdfs.x86_64

yum remove -y  rrdtool.x86_64

yum remove -y  hbase.noarch

yum remove -y  pig.noarch

yum remove -y  lzo.x86_64

yum remove -y  ambari-log4j.noarch

yum remove -y  oozie.noarch

yum remove -y  oozie-client.noarch

yum remove -y  gweb.noarch

yum remove -y  snappy-devel.x86_64

yum remove -y  hcatalog.noarch

yum remove -y  python-rrdtool.x86_64

yum remove -y  nagios.x86_64

yum remove -y  webhcat-tar-pig.noarch

yum remove -y  snappy.x86_64

yum remove -y  libconfuse.x86_64

yum remove -y  webhcat-tar-hive.noarch

yum remove -y  ganglia-gmetad.x86_64

yum remove -y  extjs.noarch

yum remove -y  hive.noarch

yum remove -y  hadoop-lzo.x86_64

yum remove -y  hadoop-lzo-native.x86_64

yum remove -y  hadoop-native.x86_64

yum remove -y  hadoop-pipes.x86_64

yum remove -y  nagios-plugins.x86_64

yum remove -y  hadoop.x86_64

yum remove -y  zookeeper.noarch

yum remove -y  hadoop-sbin.x86_64

yum remove -y  ganglia-gmond.x86_64

yum remove -y  libganglia.x86_64

yum remove -y  perl-rrdtool.x86_64

yum remove -y  epel-release.noarch

yum remove -y  compat-readline5*

yum remove -y  fping.x86_64

yum remove -y  perl-Crypt-DES.x86_64

yum remove -y  exim.x86_64

yum remove -y ganglia-web.noarch

yum remove -y perl-Digest-HMAC.noarch

yum remove -y perl-Digest-SHA1.x86_64

yum remove -y bigtop-jsvc.x86_64

yum remove -y bigtop-tomcat.noarch

yum remove -y libgenders.x86_64

#3.删除快捷方式

cd /etc/alternatives

rm -rf hadoop-etc

rm -rf zookeeper-conf

rm -rf hbase-conf

rm -rf hadoop-log

rm -rf hadoop-lib

rm -rf hadoop-default

rm -rf oozie-conf

rm -rf hcatalog-conf

rm -rf hive-conf

rm -rf hadoop-man

rm -rf sqoop-conf

rm -rf hadoop-conf

#4.删除用户

userdel nagios

userdel hive

userdel ambari-qa

userdel hbase

userdel oozie

userdel hcat

userdel mapred

userdel hdfs

userdel rrdcached

userdel zookeeper

userdel mysql

userdel sqoop

userdel puppet

#5.删除文件夹

rm -rf /var/lib/pgsql

rm -rf /hadoop

rm -rf /etc/hadoop

rm -rf /etc/hbase

rm -rf /etc/hcatalog

rm -rf /etc/hive

rm -rf /etc/ganglia

rm -rf /etc/nagios

rm -rf /etc/oozie

rm -rf /etc/sqoop

rm -rf /etc/zookeeper

rm -rf /var/run/hadoop

rm -rf /var/run/hbase

rm -rf /var/run/hive

rm -rf /var/run/ganglia

rm -rf /var/run/nagios

rm -rf /var/run/oozie

rm -rf /var/run/zookeeper

rm -rf /var/log/hadoop

rm -rf /var/log/hbase

rm -rf /var/log/hive

rm -rf /var/log/nagios

rm -rf /var/log/oozie

rm -rf /var/log/zookeeper

rm -rf /usr/lib/hadoop

rm -rf /usr/lib/hbase

rm -rf /usr/lib/hcatalog

rm -rf /usr/lib/hive

rm -rf /usr/lib/oozie

rm -rf /usr/lib/sqoop

rm -rf /usr/lib/zookeeper

rm -rf /var/lib/hive

rm -rf /var/lib/ganglia

rm -rf /var/lib/oozie

rm -rf /var/lib/zookeeper

rm -rf /var/tmp/oozie

rm -rf /tmp/hive

rm -rf /tmp/nagios

rm -rf /tmp/ambari-qa

rm -rf /tmp/sqoop-ambari-qa

rm -rf /var/nagios

rm -rf /hadoop/oozie

rm -rf /hadoop/zookeeper

rm -rf /hadoop/mapred

rm -rf /hadoop/hdfs

rm -rf /tmp/hadoop-hive

rm -rf /tmp/hadoop-nagios

rm -rf /tmp/hadoop-hcat

rm -rf /tmp/hadoop-ambari-qa

rm -rf /tmp/hsperfdata_hbase

rm -rf /tmp/hsperfdata_hive

rm -rf /tmp/hsperfdata_nagios

rm -rf /tmp/hsperfdata_oozie

rm -rf /tmp/hsperfdata_zookeeper

rm -rf /tmp/hsperfdata_mapred

rm -rf /tmp/hsperfdata_hdfs

rm -rf /tmp/hsperfdata_hcat

rm -rf /tmp/hsperfdata_ambari-qa

#5.重置数据库，删除ambari包

#采用这句命令来检查yum list installed | grep ambari

ambari-server stop

ambari-agent stop

ambari-server reset

yum remove -y ambari-*

yum remove -y postgresql

rm -rf /etc/yum.repos.d/ambari*

rm -rf /var/lib/ambari*

rm -rf /var/log/ambari*

rm -rf /etc/ambari*