Apache
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Apache Presentation Transcript

  • 1. APACHE
  • 2. SYNAPSIS
    • Introduction
    • Download and extract the files
    • Configuring
    • Modules
    • Build and install
    • Customize
    • Test your server
  • 3. Introduction
    • Apache is the most widely used HTTP-server in the world today.
    • It surpasses all free and commercial competitors on the market, and provides a myriad of features; more than the nearest cmpetitor could give you on a UNIX variant.
    • It is also the most used web server for a Linux system.
    • A web server like Apache, in its simplest function, is software that displays and serves HTML pages hosted on a server to a client browser that understands the HTML code.
    • Mixed with third party modules and programs, it can become powerful software, which will provide strong and useful services to a client browser.
  • 4. Download Extract the Files
    • The best place to get Apache is from the Apache HTTP Server download site.
    • Once you've downloaded the files you need to uncompress them and untarring:
    • gunzip -d httpd-2_0_NN.tar.gz
    • tar xvf httpd-2_0_NN.tar
    • This creates a new directory under the current directory with the source files.
  • 5. Configuring
    • Once you've got the files, you need to tell your machine where to find everything by configuring the source files.
    • This is done using the script configure included in the root directory of the distribution.
    • To configure the source tree using all the default options, simply type ./configure. To change the default options, configure accepts a variety of variables and command line options.
    • The most important option is the location --prefix where Apache is to be installed later, because Apache has to be configured for this location to work correctly
  • 6. Modules
    • you can specify which features you want included in Apache by enabling and disabling modules.
    • Apache comes with a Base set of modules included by default. Other modules are enabled using the --enable-module option,
    • module is the name of the module with the mod_ string removed and with any underscore converted to a dash.
    • You can also choose to compile modules as shared objects (DSOs) -- which can be loaded or unloaded at runtime -- by using the option --enable-module=shared.
    • Similarly, you can disable Base modules with the --disable-module option.
    • Be careful when using these options, since configure cannot warn you if the module you specify does not exist; it will simply ignore the option.
  • 7. ...continued
    • You can also set specific environment variables and modules. Some of the modules are:
    • * mod_alias - to map different parts of the URL tree
    • * mod_include - to parse Server Side Includes
    • * mod_mime - to associate file extensions with its MIME-type
    • * mod_rewrite - to rewrite URLs on the fly
    • * mod_speling (sic) - to help your readers who might misspell URLs
    • * mod_ssl - to allow for strong cryptography using SSL
    • * mod_userdir - to allow system users to have their own Web page directories
  • 8.
    • It is sometimes necessary to provide the configure script with extra information about the location of your compiler, libraries, or header files.
    • This is done by passing either environment variables or command line options to configure.
    • For a short impression of what possibilities you have, here is a typical example which compiles Apache for the installation tree /sw/pkg/apache with a particular compiler and flags plus the two additional modules mod_rewrite and mod_speling for later loading through the DSO mechanism:
    • $ CC="pgcc" CFLAGS="-O2"
    • ./configure --prefix=/sw/pkg/apache
    • --enable-rewrite=shared
    • --enable-speling=shared
  • 9. Build and install
    • Now you can build the various parts which form the Apache package by simply running the command:
    • $ make
    • Now it's time to install the package under the configured installation PREFIX (see --prefix option above) by running:
    • $ make install
  • 10. customize
    • Next, you can customize your Apache HTTP server by editing the configuration files under PREFIX/conf/.
    • $ vi PREFIX/conf/httpd.conf
    • Note: you'll need to be root to edit this file.
  • 11. Test Your Server
    • Now you can start your Apache HTTP server by immediately running:
    • $ PREFIX/bin/apachectl start
    • And then you should be able to request your first document via URL http://localhost/.
    • The web page you see is located under the DocumentRoot which will usually be PREFIX/htdocs/. Then stop the server again by running:
    • $ PREFIX/bin/apachectl stop
    • Specifically, it will say in big letters "Seeing this instead of the website you expected?" This is good news, as it means your server installed correctly.
  • 12. Uninstall apache
    • OPTION 1: Run this command if you installed apache with RPM or throug the automatic option during the Fedora/Red Hat OS installation.
    • Code : yum remove httpd
    • OPTION 2: Run
    • Code: /etc/init.d/httpd stop to get the package name.
    • It should come back with something like this:
    • Code: apachecfg-0.3.1-6
    • apache-1.2.5-1
    • You can then use this command to remove Apache:
    • Code: rpm -e apache-1.2.5-1
  • 13.
    • OPTION 3.
    • If you compiled apache on your own. If you did a manual install then just delete /usr/local/apache (or wherever it is installed).
    • OPTION 4.
    • if you are doing it manually then to remove Apache from your Linux server, enter this line at the Linux command prompt:
    • Code: rm -rf /usr/local/apache2
    • OPTION 5:
    • To find files by name try "locate"; it will force you to run updatedb the first time.
    • To find packages that are installed try rpm -qa *apache* *mysql*
    • { note "rpm -qa" lists all installed packages }