cd /usr/local/src
check latest zendoptimizer
wget http://www.eth0.us/files/ZendOptimizer-3.0.1-linux-glibc21-i386.tar.gz
tar -zxf ZendOptimizer-3.0.1-linux-glibc21-i386.tar.gz
cd ZendOptimizer-3.0.1-linux-glibc21-i386
./install
If u still receiving “Zend Optimizer Not Installed” error page, then
SELinux is interfering with Apache’s attempt to access the .so file.
So do this commands
#chcon -t texrel_shlib_t  path_of_ZendOptimizer.so (/usr/local/Zend/ZendOptimizer.so)
#execstack -c path_of_ZendOptimizer.so (/usr/local/Zend/ZendOptimizer.so)
#setenforce 0
#getenforce
then restart httpd and check.
If the issue still persist,
vi /etc/selinux/config
SELINUX=disabled
then reboot the server

cd /usr/local/src

check latest zendoptimizer

wget http://www.eth0.us/files/ZendOptimizer-3.0.1-linux-glibc21-i386.tar.gz

tar -zxf ZendOptimizer-3.0.1-linux-glibc21-i386.tar.gz

cd ZendOptimizer-3.0.1-linux-glibc21-i386

./install

If u still receiving “Zend Optimizer Not Installed” error page, then

SELinux is interfering with Apache’s attempt to access the .so file.

So do this commands

#chcon -t texrel_shlib_t  path_of_ZendOptimizer.so (/usr/local/Zend/ZendOptimizer.so)

#execstack -c path_of_ZendOptimizer.so (/usr/local/Zend/ZendOptimizer.so)

#setenforce 0

#getenforce

then restart httpd and check.

If the issue still persist,

vi /etc/selinux/config

SELINUX=disabled

then reboot the server