Installation query
 

How can I know if PHP is installed in my machine?

Try ls /var/log/packages this should show all your installed packages . You could also use whereis, find or locate <filename>


:Pengy:

Query it
 

Just query it

[root@server ~]# rpm -qa php

It will give u the result as if it is installed

php-5.1.2-5

or else it will display empty which indicates that it is not installed..