Thnx to Leon Maurer ```sudo update-alternatives --remove ri /usr/bin/ri1.8```
sloved my problem too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/876097 Title: update-alternatives: error: alternative ri can't be slave of ruby: it is a master alternative. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ri/+bug/876097/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
