Login to your Linux server using SSH. First configure the apt source list and update.

#vi /etc/apt/sources.list                ## if you want add extra repositories.

#apt-get update

Then run a server upgrade for installing necessary updates.

#apt-get upgrade

Setup your server’s host Name. Eg: www.myserver.com

#vi /etc/hostname    # add your server name here

Lets start installing LAMP stack. First install apache web server.

#apt-get install apache2

Set serverName directive in apache config file.

#echo “ServerName localhost” | sudo tee /etc/apache2/conf.d/fqdn

Lets install PHP

#apt-get install php5 php-pear php5-suhosin

**  Suhosin is an advanced protection system for PHP installations.

And finally Mysql Server.

#apt-get install mysql-server php5-mysql

Enter new mysql root password twice when prompted.

Reload apache for reflect your changes.

#/etc/init.d/apache2 restart

Check  all stuffs are working.

#netstat -ntlp

It will print the listening ports of your server. In our case we will get port 80 (HTTP), and 3306 (MYSQL).

Configure apache for hosting your site.

1.Enabling Rewrite module in apache.
This is very commonly used apache module used to rewrite the URLs on basis of rewrite conditions and rules. It is very complex and difficult to understand but once implemented it is a cool stuff.

Run the following command and edit the config file for doing this

#a2enmod rewrite

#vi /etc/apache2/sites-enabled/000-default

Find the portion in the config file and change “AllowOverride None” to “AllowOverride All”

Your config file now look like this.

…..

<Directory /var/www/>

Options Indexes FollowSymLinks MultiViews

AllowOverride All

Order allow,deny

allow from all

</Directory>

………..

Then Restart apache

#/etc/init.d/apache2 restart

2. Configure Name based virtual hosting ( For hosting multiple sites on a single IP)

Set following value in /etc/apache2/ports.conf file

NameVirtualHost *:80

This will enable Name based virtual hosting in apache and make apache to listen on interface. if you want to limit this on one particular interface just replace the * the interface IP.

Lets host a site on apache. We are going to host a website named www.myfirst-site.com.

Go to the following directory.

#cd /etc/apache2/sites-available/

#vi www.myfirst-site.com

Add the contents like this

<VirtualHost *:80>

ServerAdmin admin@myfirst-site.com

ServerName myfirst-site.com

ServerAlias www.myfirst-site.com

DocumentRoot /var/www/www.myfirst-site.com/

</VirtualHost>

Save and exit!

Make a web root for www.myfirst-site.com

#mkdir /var/www/www.myfirst-site.com/

# cd /var/www/www.myfirst-site.com/

# vi index.html

Enter “This is My First Site”

Save and exit.

Then Put this site on-line by running the following command

#a2ensite www.myfirst-site.com

Restart apache server.

#/etc/init.d/apache2 restart

Browse http://www.myfirst-site.com (You may need to point your DNS to your server IP)

Now you  configured your LAMP server.

The service is a valuable tool for system administrators to make sure they want instant notification if the servers are unavailable even for a short period of time.    The service is currently free, so get your free account and start monitoring those servers.

Create an xml file(say sitemap.xml). Its better to create the xml file dynamically using the scripting language like php, jsp etc.

Format of sitemap xml  accepted by google:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.google.com/schemas/sitemap/0.84" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.google.com/schemas/sitemap/0.84 http://www.google.com/schemas/sitemap/0.84/sitemap.xsd">
<url>
<loc>http://domain.tld/</loc>
<lastmod>2008-01-01</lastmod>
<changefreq>daily</changefreq>
<priority>0.1</priority>
</url>
</urlset>

The points to be remembered when creating a sitemap are:

1. Sitemap should start with the tag <urlset> and end with </urlset>
2. Each set of xml entry shouild start with <url> and end with </url>
3. <loc></loc> contains the url
4. The <lastmod> tag expects a date in the  format YYYY-MM-DD,  or the date format can be in w3c format.
5. The <changefreq> tag expects one of the  values: always, hourly, daily, weekly, monthly etc.
6. The <priority> can be a value between 1.0 and 10

7. Replace special charecters from xml file.
Character                   Replacement
Ampersand     &         &amp;
Single Quote    ‘         &apos;
Double Quote  “         &quot;
Greater Than   >        &gt;
Less Than       <        &lt;

8. Encoding should be UTF-8 mode
9. The maximum permitted size of a sitemap file is 10 MB.

Sample PHP  code for sitemap generation:

$xml = '';
$xml =  "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"."\n";
$xml .= "<urlset xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd\" xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">"."\n";
for($i=0;$i<$subLimit;$i++){
$title = str_replace("&","&amp;",strip_tags($response['title']));
$loc = str_replace("&","&amp;",strip_tags($response['location']));
$com = str_replace("&","&amp;",strip_tags($response['company']));
//$loc1 = $row['job_jobs_location'];
$title = htmlentities($title, ENT_QUOTES, "UTF-8");
$com = htmlentities($com, ENT_QUOTES, "UTF-8");
$loc = htmlentities($loc, ENT_QUOTES, "UTF-8");
$date = $response['date'];
$date = strtotime($date);
$date = date(DATE_W3C, $date);   //Date in w3c format
$xml .= "<url>"."\n";
$xml .= "<loc>http://www.jobtreks.com/jobresult/$title/$com/$loc/$id</loc>"."\n";
$xml .= "<lastmod>$date</lastmod>"."\n";
$xml .= "<priority>0.50</priority>"."\n";
$xml .= "<changefreq>weekly</changefreq>"."\n";
$xml .= "</url>"."\n";}
$xml .= "</urlset>";
$fh = fopen('sitemap.xml', 'w'); //After exceuting this file, an xml file called sitemap.xml is created.

The following configuration will allow you to use group features offered by openfire and also allow you to authenticate with  Zimbra’s OpenLDAP.

1. Openfire setup: When setting up openfire for the first time, use the Default user and groups database in the Profile Settins page.  Do no select LDAP directory provider.

2. Admin setup:  After setup, login to the openfire admin, go to Server Manger -> System Properties

3. Change the value of property provider.auth.className to be org.jivesoftware.openfire.ldap.LdapAuthProvider .    We are basically telling Openfire to use Ldap Authentication provider java class instead of the default.

4. Add these two new property values :

ldap.host = <your LDAP host name>
ldap.baseDN = dc=<ldap doman>,dc=com

5.  IMPORTANT: Add a new admin user in openfire that can be validated against the LDAP server.  Without this you may not be able to login back to openfire.

Thats it.   If everything is right, you should now be able to login to spark using your ldap credentials.

Please note:  To use the user and group features, you will need to add all ldap users into openfire.   You will have to manually add the users into openfire, but I am sure that a small java or perl script can easily  populate the “ofUser” table in openfire’s database from LDAP.

This has not been very thorughly tested, but initial experiments seem to work.  Please post your comments and suggestions.

Create a .htaccess file in the root of your application with the following content.  Please put in the appropriate values for AuthLDAPURL.

AuthBasicProvider ldap
AuthzLDAPAuthoritative off
AuthType Basic
AuthName “Enter your userid and password :”
AuthLDAPURL “ldap://your.ldap.server/dc=domain,dc=com?uid?sub?(objectClass=*)
Require valid-user

You may restrict access to specific users by repacing “Require valid-user” with something like “Require john, harry”.  In this case only john and harry can access the application.