To start a managed or clustered server in the WebLogic Administration Console:
Run the startNodeManager file.
In Windows, the file is named "startNodeManager.cmd" and is located in: weblogic_home\wlserver_x.x\server\bin\
In Unix, the file is named "startNodeManager.sh" and is located in: weblogic_home/wlserver_x.x/server/bin/
where x.x is there version for your WebLogic server.
Launch the WebLogic Administration Console.
Note: You can open the Administration Console via a web browser using this address: http://serverIP:listenport/console. The default listenport is 7001.
In the Welcome window, log in using the user name and password that you created when you created your WebLogic domain.
In the Change Center pane of the Administration Console, click Lock & Edit.
In the Domain Structure pane:
Expand Environment.
Click Servers.
In the Summary of Servers pane:
Select the Control tab.
Select the option for your managed server.
Click Start.
In the Server Life Cycle Assistant pane, click Yes.
In the Summary of Servers pane, click the 'Start Refresh' icon in the middle of the pane to see when the State column says 'RUNNING.'