This is 3rd and the final installment for Apache Chroot Jail for CentOS / RHEL series. Once Apache is configured with mod_chroot, you may need to test and debug problems. This article will provide a few troubleshooting tips.
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segmentation fault
It appears that latest php version 5.1.6-20.el5_2.1 under RHEL / CentOS Linux v5.2 has made some major changes. As a result choort jail setup using previous instructions no longer works. PHP is crashing with segmentation fault errors. So I had to trace php errors using strace command.
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An error in which a running program attempts to access memory not allocated to it and core dumps with a segmentation violation error. Here are few tips to track down “Segmentation Fault” error under UNIX / Linux.
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Few days back I wrote about strace tool for reporting and finding bug in program. Today I’m going to talk about another interesting tool called valgrind.
Valgrind is a flexible program for debugging and profiling Linux executables. It consists of a core, which provides a synthetic CPU in software, and a series of “tools”, [...]
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