PERL MODULES
What is Perl?
Perl is a high-level programming language with an eclectic heritage written by Larry Wall and a cast of thousands. It derives from the ubiquitous C programming language and to a lesser extent from sed, awk, the Unix shell, and at least a dozen other tools and languages. Perl’s process, file, and text manipulation facilities make it particularly well-suited for tasks involving quick prototyping, system utilities, software tools, system management tasks, database access, graphical programming, networking, and world wide web programming. These strengths make it especially popular with system administrators and CGI script authors, but mathematicians, geneticists, journalists, and even managers also use Perl.
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Mod_Perl
1. What is mod_perl ?
2. Working of mod_perl.
3. Advantage & Disadvantages of mod_perl.
4. Downloading and Installation.
5. Configuration.
6. Some common errors.
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PHP DSO
DSO – Dynamically Shared Objects
Apache with PHP can be installed in two different ways.
- Statically embed the PHP binary into the Apache binary. This is probably the fastest and best way to run PHP
- Install Apache and PHP is by using Apache’s DSO module
Why DSO?
Apache supports adding modules on instead of embedding them in the httpd binary. This works well when you don’t want to re-compile Apache each time a module is updated, or if you want to add on numerous modules for development purposes
System Administrators Dream: Allows developers to upgrade PHP without having to recompile Apache
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QMAIL
Qmail is an MTA similar to Exim
INSTALLATION
Installation involves the following steps:
1.Installing Qmail itself
2.Installing EZmlm and EZmlm-idx
3.Installing Autoresponder
4.Installing Vpopmail
5.Installing maildrop
6.Uninstalling Sendmail
7.Starting up qmail
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Installation Steps :
preparing step :
Edit or create a file /etc/yum.repos.d/dag.repo. Add lines below at the end of the file:
[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=1
enabled=1
Add line below at the end of the file /etc/ld.so.conf:
/usr/local/lib
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