Hi My logback.xml contains the following RollingFileAppender configuration: <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <File>/usr/share/tomcat5/logs/Dummy.log</File> <RollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>Dummy.%d.log</FileNamePattern> <MaxHistory>120</MaxHistory> </RollingPolicy> <layout class="ch.qos.logback.classic.PatternLayout"> <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern> </layout> </appender> The log file is created in /usr/share/tomcat5/logs, which is on the production Unix server. The problem is my development environment is on Windows, and Tomcat in a different directory, so I have to modify the directory every time before I deployed the application to the production server. Is there a convenient way that I don't have to modify logback.xml, and share the same logback.xml in different environments? Thank you! -- Hez