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Tomcat Environment Variables
CATALINA_HOME and CATALINA_BASE
Environment Variable Usage
The CATALINA_HOME environment variable points to the Tomcat installation directory, while CATALINA_BASE represents the root of a runtime configuration of a particular Tomcat instance. When installing multiple Tomcat instances, the CATALINA_HOME environment variable should be set to the directory name of each installation.
To check the values of CATALINA_BASE and CATALINA_HOME, run the "startupsh" command. The description below uses the CATALINA_BASE variable name to refer to the base directory against which most relative paths are resolved.
Retrieving Variable Values
Tomcat provides several methods to retrieve the values of CATALINA_HOME and CATALINA_BASE:
- Using the "System.getProperty()" method
- Reading the "server.xml" configuration file
- Checking the command-line arguments passed to the Tomcat startup script
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