MongoDB Documentation, Release 3.0.4 Step 2: Install the MongoDB packages and associated tools. When you install the packages, you choose whether to install the current release or a previous one. This step provides the commands for both. To install the latest stable version of MongoDB, issue the following command: sudo yum install -y mongodb-org To install a specific release of MongoDB, specify each component package individually and append the version number to the package name, as in the following example: sudo yum install -y mongodb-org-3.0.4 mongodb-org-server-3.0.4 mongodb-org-shell-3.0.4 You can specify any available version of MongoDB. However yum will upgrade the packages when a newer version becomes available. To prevent unintended upgrades, pin the package. To pin a package, add the following exclude directive to your /etc/yum.conf file: Versions of the MongoDB packages before 2.6 use a different repo location. Refer to the version of the documentation appropriate for your MongoDB version. exclude= mongodb-org,mongodb-org-server,mongodb-org-shell,mongodb-org-mongos,mongodb-org-tools Run MongoDB The MongoDB instance stores its data files in /var/lib/mongo and its log files in /var/log/mongodb by default, and runs using the mongod user account. You can specify alternate log and data file directories in /etc/mongod.conf . See systemLog.path and storage.dbPath for additional in- formation. If you change the user that runs the MongoDB process, you must modify the access control rights to the /var/lib/mongo and /var/log/mongodb directories to give this user access to these directories. Step 1: Start MongoDB. You can start the mongod process by issuing the following command: sudo service mongod start Step 2: Verify that MongoDB has started successfully You can verify that the mongod process has started suc- cessfully by checking the contents of the log file at /var/log/mongodb/mongod.log for a line reading [initandlisten] waiting for connections on port <port> where <port> is the port configured in /etc/mongod.conf , 27017 by default. You can optionally ensure that MongoDB will start following a system reboot by issuing the following command: sudo chkconfig mongod on Step 3: Stop MongoDB. As needed, you can stop the mongod process by issuing the following command: sudo service mongod stop Step 4: Restart MongoDB. You can restart the mongod process by issuing the following command: sudo service mongod restart You can follow the state of the process for errors or important messages by watching the output in the /var/log/mongodb/mongod.log file. 15 2.3. Installation Guides