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Day 15

Day 15. Apache. Being a web server. Once your system is correctly connected to the network, you could be a web server. When you go to a web site such as http://www.cnn.com You are connecting to a machine which has web server software running on it.

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Day 15

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  1. Day 15 Apache

  2. Being a web server • Once your system is correctly connected to the network, you could be a web server. • When you go to a web site such as http://www.cnn.com • You are connecting to a machine which has web server software running on it. • If the machine is running Windows, you are most likely talking to IIS server. • If it is running Unix of some form, you are most likely talking to Apache server. • Netscape also makes web servers, many people use them also, they are available for both windows and Unix.

  3. Apache • Apache is nothing more than a daemon which listens on port TCP 80 for incoming requests. • It then serves appropriate files from your hard drive in response to those requests.

  4. Document Root • All web servers have a notion of a document root. • This is the only place on the hard drive that users on the web can request documents from. • This protect average files from being viewed across the internet. • The web server will upon startup immediately run a chroot command to prevent itself from being tricked into looking at parts of the hard drive it doesn’t have permissions to.

  5. Permissions • All files in the document root should probably be world readable. • The apache daemon actually runs as a user [typically “nobody”] and as long as that user has permission to view the files, they will be available on the web.

  6. Starting/Stopping Apache • Apache runs as a regular process, just like anything else. • Usually called • httpd • You could kill it, however you are advised to use the commands: • apache start • apache stop • To start or stop it. This gives apache a chance to update some other stuff.

  7. Configuring Apache • Apache will create a directory into which it will put all its files: • Usually either: • /usr/local/apache • /var/httpd/ • In the directory, you will find a conf directory, and in there you will find a httpd.conf file. • This is where all configuration options of Apache are set.

  8. Apache logs. • The log files for apache are stored in • /var/log/httpd/access.log • /var/log/httpd/errors.log • These are rotated and removed as often as you tell it to.

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