Here is what I found in /var/log/messages Jun 18 09:17:38 ws65 litespeed (lshttpd): stack smashing detected: terminated Jun 18 09:19:03 ws65 litespeed (lshttpd): stack smashing detected: terminated Jun 18 09:20:15 ws65 last message repeated 5 times Jun 18 09:21:30 ws65 last message repeated 5 times Jun 18 09:22:31 ws65 last message repeated 4 times Jun 18 09:23:46 ws65 last message repeated 5 times Jun 18 09:25:16 ws65 last message repeated 3 times /usr/local/lsws/bin/lshttpd -v LiteSpeed/4.2.12 Enterprise Of course, litespeed crashed with this message. core file is available in /tmp/lshttpd/bak_core, however it shows me nothing except gdb /usr/local/lsws/bin/lshttpd /tmp/lshttpd/bak_core/core.494834 GNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-45.el5) Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i386-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/local/lsws/bin/lshttpd...(no debugging symbols found)...done. warning: core file may not match specified executable file. [New Thread 494834] [New Thread 494835] [New Thread 494836] Core was generated by `litespeed'. Program terminated with signal 4, Illegal instruction. #0 0x082c4cfa in ?? () Please help.