Thank you @Colin Watson. I reported this to the upstream. Here is the link to the bug: https://bugzilla.mindrot.org/show_bug.cgi?id=2643
** Bug watch added: OpenSSH Portable Bugzilla #2643 https://bugzilla.mindrot.org/show_bug.cgi?id=2643 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1638338 Title: Can not ssh with tr_TR.UTF-8 locales (Bad configuration options) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1638338/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs