Referring to:

1. http://docs.mongodb.org/manual/tutorial/install-mongodb-on-red-hat-centos-or-fedora-linux/
2. Any other MongoDB 2.6 upgrade pages applicable

As of MongoDB 2.4 our yum package names have changed from mongo-10gen* to mongodb-org*

Given the name change the upgrade path would be a package uninstall of 10gen followed by an install of mongodb-org. The problem we encounter here is that the mongod.conf file may be removed and recreated as part of this process. This side-affect may not be apparent to all upgraders. (It should backup this file - but we saw a case where it may not have. We will investigate separately but regardless backup and confirmation of mongod.conf contents is a good practice).

Please add an "upgrade" section to this page and make backing up and confirming contents of the mongod.conf file part of the process.