从终端进入tomcat的bin目录，然后执行startup.sh，出现以下异常：
Cannot find ./catalina.sh The file is absent or does not have execute permission This file is needed to run this program
解决方案如下：
在tomcat 的bin目录下 执行 chmod +x *.sh 然后用sh startup.sh启动成功
原文：http://www.cnblogs.com/sunyj/p/6073127.html