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Editorial Team
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Asked: 2026-05-22T03:20:38+00:00

Is there a OS command to find what Java version Tomcat6 is using? I

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Is there a OS command to find what Java version Tomcat6 is using?
I need to use a Perl (including system()) command.

I using Linux. Ubuntu and CentOS

Is there something like?

     tomcat6 version
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  1. Editorial Team

    At first you need to understand first, that Tomcat is a Java application.
    So, to see which java version Tomcat is using, you can just simply find the script file from which Tomcat is started, usually catalina.sh.

    Inside this file, you will get something like below:

    catalina.sh:#   JAVA_HOME       Must point at your Java Development Kit installation.
catalina.sh:#                   Defaults to JAVA_HOME if empty.
catalina.sh:  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
catalina.sh:  JAVA_HOME=`cygpath --absolute --windows "$JAVA_HOME"`
catalina.sh:    echo "Using JAVA_HOME:       $JAVA_HOME"

    By default, JAVA_HOME should be empty, which mean it will use the default version of java, or you can test with: echo $JAVA_HOME

    And then use “java -version” to see which version you default java is.

    And vice versa by setting this property: JAVA_HOME, you can configure which Java version to use when starting Tomcat.

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