Even worse, once you go for Tomcat7 there is no way back to Tomcat6 with apt, reported error is:
The following packages have unmet dependencies: tomcat6 : Depends: tomcat6-common (>= 6.0.35-1ubuntu3.2) but it is not going to be installed E: Unable to correct problems, you have held broken packages. On Ubuntu 12.04 LTS -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to tomcat7 in Ubuntu. https://bugs.launchpad.net/bugs/1031395 Title: tomcat6 and tomcat7 are not installable side-by-side To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tomcat7/+bug/1031395/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
