- 리눅스에서 core dump 는 자동 생성 되지 않는다. 기본 셋팅은 생성 않됨으로 되어 있다.

[root@reyad tmp]# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
pending signals                 (-i) 1024
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 18431
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
[root@reyad tmp]#

core file size          (blocks, -c) 0 ==> core file size 가 0 인것을 확인 할수 있다.

1. /etc/profile 수정

 #vi /etc/profile

At line 26 of the file, replace this line: ulimit -S -c 0 > /dev/null 2>&1

ulimit -S -c 0 > /dev/null 2>&1  ===> ulimit -c unlimited >/dev/null 2>&1

변경

2. /etc/init.d/functions 

#vi /etc/init.d/functions

ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0} >/dev/null 2>&1
#ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0} >/dev/null 2>&1 (주석처리)

3. /etc/sysconfig/init

#vi /etc/sysconfig/init

DAEMON_COREFILE_LIMIT='unlimited' 추가 ==> 서버에서 실행 되는 모든 데몬에 적용

4. echo 1 > /proc/sys/kernel/suid_dumpable

#echo 1 > /proc/sys/kernel/suid_dumpable 실행

5. /etc/sysctl.conf

#vi /etc/sysctl.conf

kernel.suid_dumpable = 1
kernel.core_uses_pid = 1
kernel.core_pattern=/tmp/core
kernel.core_setuid_ok = 1

#sysctl -p (실행)

6. /etc/security/limits.conf

*               -       core    unlimited (추가)

7. system 재부팅