enable coredump in centos

coredump.cfg

Step 1.
Edit /etc/security/limits.conf

Step 2.
Notice this is set to all processes but if you have a process running as a service account replace the * with the service account.

Step 3.
Next, you will have to restart the process for this change to go into effect.

# vi /etc/security/limits.conf

#* soft core 0
* soft core unlimited
Step 4.
Edit /etc/sysctl.conf and add where to put the core file and any naming standard.

# vi /etc/sysctl.conf

kernel.core_pattern = /tmp/core-%e-%s-%u-%g-%p-%t
fs.suid_dumpable = 2
Filename variables:

%e is the filename
%g is the gid the process was running under
%p is the pid of the process
%s is the signal that caused the dump
%t is the time the dump occurred
%u is the uid the process was running under

Step 5.
Edit the /etc/sysconfig/init and set a core file limit:

# vi /etc/sysconfig/init

DAEMON_COREFILE_LIMIT='unlimited'
Step 6.
Finally, issue this command:

# sysctl -p
That’s it. So finally next time if your server crash, you will already have a core file created.