I am getting conflict when
[root@MongoDB ec2-user]# sudo yum install mongodb-org Loaded plugins: priorities, security, update-motd, u
remove the old mongodb
sudo yum remove mongo-10gen-server mongo-10gen-tools mongo-10gen-shell mongo-10gen-mongos mongo-10gen
install the new mongodb (prerequisitely, you must config the yum source, refer here )
sudo yum install mongodb-org