What are core files in Linux?

System core files (Linux® and UNIX)

If a program terminates abnormally, a core file is created by the system to store a memory image of the terminated process. Errors such as memory address violations, illegal instructions, bus errors, and user-generated quit signals cause core files to be dumped.

Where are core dumps stored Ubuntu?

2 Answers. In Ubuntu the core dumps are handled by Apport and can be located in /var/crash/ .