I have ubuntu 16 and I would like to upgrade to the last one, 18. but I installed sikulix and it requires a specific version (2.4) of a library( opencv) I know, having tested, that on a fresh installation, that on ubuntu 18 the version 3 is installed by default. I don't know if the new version of this library will replace the old one by upgrading, that's something I would like to avoid.
Will v2.4 be replaced? If so, how to avoid it?
EDIT before upgrading, I have a big doubt: what about other dependencies? Is there a quicker way than collecting all the dependencies of sikulix and mark them as not to be updated? and what about dependencies of these dependencies? :-(