Error from dpkg while installing from the jenkins-ci apt repository:

Unpacking jenkins (from .../archives/jenkins_1.510_all.deb) ...
dpkg: error processing /var/cache/apt/archives/jenkins_1.510_all.deb (--unpack):
 trying to overwrite '/usr/share/jenkins/jenkins.war', which is also in package jenkins-common 1.424.6+dfsg-1ubuntu0.1

Steps to reproduce:

1. Install jenkins from the standard Ubuntu repositories. (currently 1.424). Ubuntu splits jenkins into packages jenkins and jenkins-common.
2. Add the jenkins-ci repository to /etc/apt/sources.list.
3. apt-get update
4. apt-get -u upgrade
   • observe that jenkins will be upgraded. Note that jenkins-common is not mentioned.
5. During upgrade, apt reports the error shown above.

Suggested fix: Consider adding "conflicts: jenkins-common".