什麼在Tomcat 6配置文件中設置$ {catalina.home}？

我試圖去適應一些舊的生成腳本與RPM安裝的Tomcat 6的運行，我運行到以下幾點：

java.lang.IllegalArgumentException: Document base /var/lib/tomcat6/webapps/host-manager does not exist or is not a readable directory 
    at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:142) 
    at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4086) 
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4255) 
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) 
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) 
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526) 
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637) 
    at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563) 
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498) 
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277) 
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321) 
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) 
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) 
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:722) 
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) 
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) 
    at org.apache.catalina.core.StandardService.start(StandardService.java:516) 
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:593) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

這並不奇怪，因爲Tomcat是不是/var/lib/tomcat6，它在/usr/share/tomcat6。當我尋找在那裏這可能是從，所有我覺得未來是在一個文件中的以下稱爲host-manager.xml：

<Context docBase="${catalina.home}/webapps/host-manager" 
    privileged="true" antiResourceLocking="false" antiJARLocking="false"> 

</Context>

現在，我有$CATALINA_HOME設置爲/usr/share/tomcat6理所應當，而且也給/var/lib任何地方的任何引用在我的網絡應用程序（包括配置）或我的Tomcat 6安裝，據我所知。那麼什麼是${catalina.home}，/var/lib/tomcat6如何取代它呢？

來源

2012-03-30 David Moles