概述
有时候测试环境比较弱，资源开销比较大，一旦产生core dump file，期间会消耗CPU、memory和disk空间。为了暂时规避此问题，需要禁止产生core dump。
操作步骤
To disable core dumps for all users
open /etc/security/limits.conf, enter:
# vi /etc/security/limits.conf
Make sure the following config directive exists
* soft core 0
* hard core 0
Save and close the file
Once a hard limit is set in /etc/security/limits.conf, the user cannot increase that limit within his own session. Add fs.suid_dumpable = 0 to /etc/sysctl.conf file:
# echo 'fs.suid_dumpable = 0' >> /etc/sysctl.conf
# sysctl -p
This will make sure that core dumps can never be made by setuid programs.
Set soft limit
Finally, add the following to /etc/profile to set a soft limit to stop the creation of core dump files for all users (which is default and must be disabled):
# echo 'ulimit -S -c 0 > /dev/null 2>&1' >> /etc/profile
