./startup.sh

?Using CATALINA_BASE:?? /software/apache-tomcat-6.0.18?
?Using CATALINA_HOME:? /software/apache-tomcat-6.0.18
?Using CATALINA_TMPDIR: /software/apache-tomcat-6.0.18/temp
?Using JRE_HOME:? /usr

用命令：
ps -ef | grep tomcat

查看沒有tomcat進程。

查看tomcat日志信息，出現了下面的錯誤：
WARNING: error instantiating 'org.apache.juli.ClassLoaderLogManager' referenced by java.util.logging.manager, class not found
java.lang.ClassNotFoundException: org.apache.juli.ClassLoaderLogManager not found
>>No stacktrace available>>;
WARNING: error instantiating '1catalina.org.apache.juli.FileHandler,' referenced by handlers, class not found
java.lang.ClassNotFoundException: 1catalina.org.apache.juli.FileHandler,
>>No stacktrace available>>;
Exception during runtime initialization
java.lang.ExceptionInInitializerError
>>No stacktrace available>>;
Caused by: java.lang.NullPointerException
>>No stacktrace available>>;

最終解決辦法：
用命令設置JAVA_HOME環境變量：
export JAVA_HOME=/software/jdk1.5.0_4/
進入 %tomcat%/bin/

./startup.sh

啟動成功！

轉自： http://www.blogjava.net/baizhihui19870626/articles/377530.html

Linux下tomcat 6 啟動出現日志異常