Core dump

Allow core dump
Permanent:

sudo vi /etc/security/limits.conf
#add line
#YOUR_USERNAME     soft    core            1000000

Temporary:

ulimit -c unlimited

Core dump

sleep 30
# Type Control-\
Quit (core dumped)

kill -ABRT <PID>
# 11602 abort (core dumped)

In C

abort()

Core dump misc

cat /proc/sys/kernel/core_pattern
man 5 core
cat /proc/PID/coredump_filter