1.查看是否安装了mysql
rpm -qa | grep -i mysql
安装了
2.停止mysql服务，删除之前安装的mysql
停止 service mysql stop 删除 rpm -e MySQL-server-5.5.47-1.linux2.6.x86_64 rpm -e MySQL-client-5.5.47-1.linux2.6.x86_64
3.查看之前老版本mysql的目录，并且删除老版本mysql的文件和库 find / -name mysql
find / -name mysql
查找结果：
1 /root/mysql 2 /root/Downloads/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/src/java/org/apache/sqoop/mapreduce/mysql 3 /root/Downloads/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/src/test/org/apache/sqoop/manager/mysql 4 /root/Downloads/apache-hive-1.2.0-bin/scripts/metastore/upgrade/mysql 5 /usr/lib64/mysql 6 /var/lib/mysql 7 /var/lib/mysql/mysq
删除对应的mysql目录：
1 rm -rf /root/mysql 2 rm -rf /root/Downloads/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/src/java/org/apache/sqoop/mapreduce/mysql 3 rm -rf /root/Downloads/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/src/test/org/apache/sqoop/manager/mysql 4 rm -rf /root/Downloads/apache-hive-1.2.0-bin/scripts/metastore/upgrade/mysql 5 rm -rf /usr/lib64/mysql 6 rm -rf /var/lib/mysql 7 rm -rf /var/lib/mysql/mysql
4.再次查找机器是否安装mysql
rpm -qa | grep -i mysql
卸载成功
