On Wed, Jan 21, 2009 at 4:05 PM, Kenneth Gonsalves
<law...@thenilgiris.com> wrote:
> suddenly found my '/' partition was full. Took a look at /tmp and found
> thousands of core.xxxx files - right up to core.9999. I did rm -f core.* and
> a whole lot were removed. But however many times i do this, more core.xxxx
> files keep appearing. I managed to free about 26 gb of space, but why is this
> happening? is it some bug? what to do about it? distro: mandriva2008.1
A core file is generate when a program does something
wrong like dereference a NULL pointer. The OS saves
the entire state of the process in the core file and terminates
the process.
You can use gdb to examine the core file in detail.
Look for a daemon that's repeatedly crashing and creating
core files. Are you running a web server on this machine?
Run "ulimit -c 0" to set core file size to zero bytes and
you will not get any more core files. This needs to be run
before the offending process is started. limits.conf can control
this behavior globally.
Modern Linux machines have fine grained control of how
core files are created. Google produced this nice article:
http://aplawrence.com/Linux/limit_core_files.html
- Raja
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