centos cannot coredump with ulimit -c is unlimited

Question

I just installed CentOs 7 on my mac using Parallel Desktop.

Here is the result of ulimit -c:

[root@centos-linux test1]# ulimit -c
unlimited

Here is the content of /etc/security/limits.conf

• soft core unlimited

But the is no coredump file created.

What else can I do to enable coredump?

Answer 1

This phenomenon results from false core dump file path.

I thought the coredump file should be created in current dir or /tmp. But it's not.

cat /proc/sys/kernel/core_pattern tells where the coredump files are.

In my system:

[root@centos-linux Linux]# cat /proc/sys/kernel/core_pattern 
/mydata/corefile/core-%e-%s-%u-%g-%p-%t

However, there is no /mydata/corefile in my system.

So I can created a new dir /mydata/corefile or using

sysctl -w kernel.core_pattern=/tmp/core-%e-%s-%u-%g-%p-%t

to get coredump file in /tmp.