配置Tomcat以特定的身份运行（非root）

https://www.cnblogs.com/jifeng/p/4970566.html

http://blog.51cto.com/53cto/1728654

http://jiangtie.iteye.com/blog/2263640

http://www.ttlsa.com/tomcat/tomcat-install-and-configure/

http://wiki.jikexueyuan.com/project/tomcat/jsps.html