A server configuration consists of a server.xml file, a bootstrap.properties file, and any optional files that are included by the two main configuration files. There is no administrative console for the Liberty profile. Administrators and developers use the WebSphere® Application Server Developer Tools for Eclipse, or a text editor, to edit the configuration files.
About this task
The Liberty profile is configured by exception. The runtime environment operates from a set of built-in configuration default settings, and you only need to specify configuration that overrides those default settings. You do this by editing either the server.xml file or another XML file that is included in server.xml at run time.
Features are the units of functionality by which you control the pieces of the runtime environment that are loaded into a particular server. They are the primary mechanism that makes the server composable. The list of features that you specify in the server configuration provides a functional server.
- By default, a server contains the jsp-2.2 feature, to support servlet and JSP applications. You can use the feature manager to add the features that you need.
- Server configuration is by exception. When you specify the features that you need, the default configuration of those features provides a rich environment that is designed to cover most common requirements, therefore you only need to specify changes from the default configuration.
Subtopics
- Liberty profile: Configuration elements in the server.xml file
The application server configuration is described in a series of elements in the server.xml configuration file. Each element has one or more attributes or sub-elements. This topic contains details of the possible elements, attributes, and sub-elements that can be configured. - Administering multiple Liberty profiles in a collective
You can organize Liberty servers into collectives to administer multiple Liberty servers at a time efficiently and accurately. 
Administering the Liberty profile by using developer tools
You can modify how the workbench interacts with the Liberty profile by using the server editor.- Administering the Liberty profile manually
You can administer the Liberty profile from the command prompt, configure it with web server plug-ins, and capture its status. You can package a Liberty server configuration along with the applications that it runs, for distribution to colleagues, or installation on other systems. If available, you can use the Equinox OSGi console to aid with debugging. 
Configuration updates
You can make updates to the configuration by using the developer tools or from the command line.
Task topic