Archive for the 'Linux' Category

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Centos 5 linux / PHP prerequisites

If you are building PHP from source on a new server, you might run into few linux prerequisites before you can complete a ./configure. You might not need all of these, or you might need more depending on how much stuff you are including in your configure line. Here is how to fix a good majority of the issues you might run into on Centos 5.

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ClamAV Update Breaks Mail Delivery

Postfix + ClamAV + SpamAssassin + Amavisd-New

As we all know, ClamAV versions older than 0.95 stopped working yesterday. This was announced some time ago by ClamAV, but caught most people (Myself and Devin) by surprise when mail flow stopped cold on our email servers. ClamAV pushed down an update that broke older versions, forcing sysadmins to either disable Antivirus, or update ClamAV to a more recent version.

We were running a very old version of ClamAV, 0.91.2-1~volatile1, from 2007. An upgrade was long overdue anyway. Here are 2 ways to fix it.

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Installing lighttpd with mod_magnet on centos x86_64

Installing lighttpd was pretty simple, however while setting up this wordpress site I wanted to enable WP Super Cache. In order to run Super Cache in full mode on lighttpd we need lighttpd with mod_magnet.

mod_magnet requires that lua be install. For some reason lighttpd doesn’t appear to like lua when it is installed via yum. So I had to compile it by source.

mkdir /root/installers
cd /root/installers
mkdir lua
cd lua
 
wget http://www.lua.org/ftp/lua-5.1.4.tar.gz
tar xvfz lua-5.1.4.tar.gz
cd lua-5.1.4

Note: if you are using x86_64 you will need to make this modification

vim src/Makefile

change

CFLAGS= -O2 -Wall $(MYCFLAGS)

to

CFLAGS= -O2 -Wall -fPIC $(MYCFLAGS)

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