Thanks for your report and for making Ubuntu better. I can confirm this bug. The .in file was added as of:
apache2 (2.4.18-2ubuntu3.16) xenial; urgency=medium * On Linux, use pthread mutexes. On kfreebsd/hurd, continue using fctnl because they lack robust pthread mutexes. (LP: #1565744) -- Bryce Harrington <br...@canonical.com> Thu, 16 Jul 2020 00:20:55 +0000 but you're correct in saying that the changelog entry does not mention the file. You are also correct in your guess: the file is a leftover of a search-and-replace operation; it should have probably been removed after the replace took place. Even though the .in file is harmless (Apache will not try to load it in any way), it should not have been installed. I am marking this bug as Triaged and will contact Bryce to sync. Thanks! ** Changed in: apache2 (Ubuntu) Status: New => Triaged ** Changed in: apache2 (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899611 Title: Purpose unclear of unknown file /etc/apache2/apache2.conf.in To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1899611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs