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when I installed joomla I can't see the index.php and I get this messages in my /var/log/apache2/error.log

[notice] child pid 3211 exit signal Segmentation fault (11)

for activate the coredump, I follow the instructions in this link

CoreDumpDirectory /tmp/apache2-gdb-dump # added this to /etc/apache2/apache2.conf
mkdir -p /tmp/apache2-gdb-dump
chown www-data: /tmp/apache2-gdb-dump
chmod 0777 /tmp/apache2-gdb-dump
/etc/init.d/httpd restart

but I don't see nothing in coredumpdirectory

ls /tmp/apache2-gdb-dump

I can see the localhost/administrator of joomla but not localhost/index.php.

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Did you request the page that causes the SegFault again after turning CoreDumps on? – Ladadadada May 22 '12 at 6:30
@Ladadadada yes, I request the page – JuanPablo May 22 '12 at 12:36

I solved in joomla.
I activate the debug mode and apply

enter image description here

and deactivate debug mode, with this I fix the problem.

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