====== My cfg: FreeBSD ======
\\

**Disable .core files**
<file bash>
sysrc dumpdev="NO"
</file>

That is for the dump that the OS creates when it crashes, not for the core files that individual programs create.
For stopping those, the //limit// (csh) or //ulimit// (sh) technique should work. One of the things that makes that technique a bit difficult is that these commands need to be executed in the environment of the program itself.

<file bash .bash_profile>
ulimit -c 0
</file>

<file bash /etc/csh.login>
limit coredumpsize 0
</file>

But overall you can:
<file bash /etc/sysctl.conf>
kern.coredump=0
</file> 

or reroute them by:

<file bash /etc/sysctl.conf>
kern.corefile=/dev/null
</file> 


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