我试过了：
# yum install tomcat6
结果如下：
Transaction Summary
=====================================================================================================================
Install 44 Package(s)
Total size: 25 M
Installed size: 51 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Check Error:
file /usr/share/java/xml-commons-jaxp-1.3-apis.jar conflicts between attempted installs of xml-commons-jaxp-1.3-apis-0:1.3.04-5.jpp5.noarch and xml-commons-apis-0:1.3.04-3.6.el6.x86_64
我不知道它出了什么问题。