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Google

To write a Google Site Map file and submit to Google

• Create and submit SiteMap Generator https://www.google.com/webmasters/tools/docs/en/sitemap-generator.html
• Add the site in Google Webmaster Tool
• Setup cron job (generate the sitemap and then nofity Google automatically) to run the Python script regularly to create the sitemap.xml.gz. 

python /home/nasthon/domains/nasthon.com/public_html/sitemap_gen.py --config=/home/nasthon/domains/nasthon.com/public_html/config.xml

If you want to resubmit sitemap to Google because content of the sitemap is changed, simply enter following url pattern to notify Google:

http://www.google.com/webmasters/sitemaps/ping?sitemap=http%3A%2F%2Fwww.nasthon.com%2Fsitemap.xml.gz

To submit the website URL directly, visit: http://www.google.com.hk/addurl/?continue=/addurl

Yahoo Sitemap Generator

Yahoo also has a sitemap program that allows you to submit a list of your webpages to Yahoo!

Create a Yahoo Sitemap xml file using our webmaster tool.

Use Yahoo Sitemap XML files to make sure that all your web pages are indexed by Yahoo. This can be done by creating a single xml file containing your sitemap. XML Sitemaps for Yahoo is a free service and easy to do.

To create your XML Sitemap file follow these steps:

• Create the sitemap as normal using our Sitemap Generator (webmaster tool)
• Click the 'Save Sitemap' tab located under the 'Sitemap' tab
• Select 'Sitemap XML' to save it out as the name you would like and then upload the sitemap to your website
• Submit your XML File to http://submit.search.yahoo.com/free/request

To use Yahoo Sitemaps, you will need a Yahoo account which is free. Then, add your website under 'My Sites'. Once in 'My Sites', click manage and add your Yahoo XML sitemap file that you just created. https://siteexplorer.search.yahoo.com/mysites

You can provide Yahoo Sitemaps with a feed in the many formats other than XML (stick with XML).

• RSS 0.9, RSS 1.0 or RSS 2.0, for example, CNN Top Stories
• Sitemaps, as documented on www.sitemaps.org
• Atom 0.3, Atom 1.0, for example, Yahoo! Search Blog
• A text file containing a list of URLs, each URL at the start of a new line. The filename of the URL list file must be urllist.txt; for a compressed file the name must be urllist.txt.gz.

Yahoo Sitemaps is easy and a great way to get indexed on this search engine!

Baidu

http://www.baidu.com/search/url_submit.html

http://news.baidu.com/newsop.html

Another useful tutor: http://www.auditmypc.com/free-sitemap-generator.asp