Determine if web site page is really up or down
Depends what you're trying to find out and what's wrong; the tips above are really good too.
- You can use whois to see what DNS servers serve up the hostname to the site: whois example.org
- You can use tools like dig to test DNS to see if the host name is resolving: dig dns.example.org www.example.org
- You can use traceroute to show the path your packets take along the network to the sitetraceroute www.example.org
- You can use telnet to connect to the TCP port of the web site to see if it's answering telnet www.example.org 80
- You can use telnet to see if it's serving content too:
Hit enter again and you should see the homepage as raw HTML.
Remember that Google often has cached versions of pages too!
OR
If you can access other sites, check Down For Everyone this will tell you whether it's just your connection to the site or a general problem with the site.
Alternatively, you can use something like the WhyDown service (which is itself currently down), it has a similar functionality, but also tries to diagnose the source of a problem, answering the "why?" question.
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