Where does ubuntu 14.04 drop core files?
By default, the Ubuntu kernel is configured to use apport to log coredumps. You can override this by overwriting
/proc/sys/kernel/core_pattern, check the "Naming of core dump files" section in
man core for details. For example:
echo '/tmp/core.%e.%p.%t' | sudo tee /proc/sys/kernel/core_pattern
Apport writes core dumps to
/var/crash/_path_to_program.userid.crash, BUT it will only do so for applications installed from the main ubuntu apt repositories.
More info on apport: https://wiki.ubuntu.com/Apport
I think this is a more Linux kernel thing than a specific Ubuntu thing. Check out
Check out the core file man page