This file is needed to run this program

今天在linux上部署tomcat 6.0.20,使用sh startup.sh启动tomcat，出现
Cannot find ./catalina.sh   
This file is needed to run this program  
Cannot find ./catalina.sh
This file is needed to run this program
然后又使用sh catalina.sh命令执行，结果
没有设置javahome，然后在catalina.sh里面添加：
JAVA_HOME=/usr/lib/jvm/jdk1.5.0_16;  
          JAVA_HOME=/usr/lib/jvm/jdk1.5.0_16;
再次执行sh catalina.sh,错误如下：
The BASEDIRenvironmentvariable is not defined correctly   
This environmentvariable is needed to run this program  
    The BASEDIRenvironmentvariable is not defined correctly
    This environmentvariable is needed to run this program
经过无数百度后，才发现那些.sh文件都不是可执行文件，于是找到命令：
chmod +x *.sh  
          chmod +x *.sh再次执行 sh catalina.sh通过，然后用sh startup.sh成功启动

来自iteye