text: currtent there is tomcat 4.0.1 installed in a sun solaris. i want to install tomcat5.0.28. how to 2 coexist? how to make these two version tomcat coexist in one server? you can install the second version also . but you have to run the 2nd server with different port number . after installing second server change the port number in tomcat5.0.28/conf/server.xml file . now restart the second server it will work fine. if any doubt send me mail.