In some message a while back the claim was made that
creating a /etc/sysctl.d/50-coredump.conf that was
empty would override the systemd installed
/usr/lib/sysctl.d/50-coredump.conf, but I can
state positively that doesn't work, the systemd
setting is still in force.
What does work is (as root):
rm -f /usr/lib/sysctl.d/50-coredump.conf
but that file will come back if there is a systemd
update.
So is there really a way to get the default
kernel core file pattern to stick around even
with systemd updates?