This article presents a brief overview of installing the development-only version of Oracle WebLogic Server (WLS) 12cR1 (12.1.1) on Oracle Linux 5 and 6. - Assumptions - Download Software - Setup - Installation - Post-Installation Related articles. At the time of writing, WebLogic 12c Release 1 was not supported on Oracle Linux 6. This article assumes you have an existing server (real or virtual) with either Oracle Linux 5.x or 6.x installed on it. For instruction on how to do this check out the following articles. - Oracle Linux 5 (OL5) Installation : I did the basic installation with no extra package groups for this installation. - Oracle Linux 6 (OL6) Installation : I picked the "Desktop" option for this installation, so I would have a graphical interface without having to select separate package groups. Everything in the installation will be 64-bit. Download the Weblogic Server 12c software from Oracle Technology Network . The following actions should be performed by the "root" user. Make sure the "/etc/hosts" file contains correct entries for both the "localhost" and real host names. Install the JDK. Create a new group and user. Create the directories in which the Oracle software will be installed. Append the following entries into the "/home/oracle/.bash_profile" file. The following actions should be performed by the "oracle" user. Unzip the software into the middleware directory. The installation instructions are present in the "README.txt" file now located in the middleware directory. Run the following script from the middleware directory. This should end with a "BUILD SUCCESSFUL" message. Run the environment script for the current shell. Create a domain, outside the middleware directory. In this case the domain will be called "mydomain". When prompted, say "y" to the default configuration and boot, then provide your preferred login username and password details. The amendment to the environment variable is necessary to prevent the, "Server is Running in Development Mode and Native Library(terminalio) to read the password securely from commandline is not found.", error. Once complete, we need to copy the following files as the "root" user. This is a requirement because we are using version 7 of the JDK. The "mydomain" directory now contains a script that can be used to start the server. Remember to use the "&" if you want access to the commandline to be returned. Once the server is started you can access the administrator console using the "http://hostname:7001/console" URL. Log in using the username and password provided in the previous step. The following scripts are useful. For more information see: - Development-Only Installation Hope this helps. Regards Tim...