i could not reach my website

I tried pinging the server, but it timed out. Port 80 is open though so it’s not a firewall issue.

You either haven't set up DNS for your sites or your Linode is down.

stevewi:~ $ ping www.expoorganizer.com
PING www.expoorganizer.com (178.79.166.212): 56 data bytes
^C
--- www.expoorganizer.com ping statistics ---
5 packets transmitted, 0 packets received, 100.0% packet loss

traceroute says there's no way to get to your Linode using the domain name you gave (output is long), so I'm betting on the former… Linode has plenty of documentation about how to do this.

-- sw

Looks like the site is now working.