Ranger install pre-requisite

If you are using super user "root" to create ranger db and user,


1.  grant all privileges on ranger.* to 'rangeradmin'@'%' with grant option;
2.  grant all privileges on ranger.* to 'root'@'<hostname where ranger>' with grant option;
or
grant ALL on *.* to 'root'@'c249-node5.example.com' identified by 'root';

and FLUSH Privileges .