The workaround is to remove the lines or to select en_US.utf8 during the installation and change locale to C.UTF-8 later. en_US.utf8 does not result in the lines being added.
While it does no much harm at first if you select C during installation,
it immediately screws up C.UTF-8 selected during installation. In that
case the installer still adds the lines above without any warning,
therefore if root logs in, he gets C insead of C.UTF-8. Good luck for
finding these lines in /root/.profile.
- Bug#891976: localechooser: Unhelpful modifications to /r... Matthew Woodcraft
- Bug#891976: reported in Ubuntu as well Hontvári Levente
- Bug#891976: it does screw up C.UTF-8 immediately Hontvári Levente
