If we come across a scenario where we are migrating a high traffic site from a third party hosting provider like hostgator or godaddy to a IaaS host, we will come across a situation where we want to test if the site that we setup on the IaaS server is ready for us to do a DNS switch.
To accomplish that testing we can use ssh to the IaaS server and once all is setup we can test it using the curl command as below:
curl --verbose --header 'Host: www.mywebsite.com' https://ipaddress:port -k
–verbose will give you a detailed overview of the command
–header ‘Host: ‘ will allow us to tell apache2 which domain name are we trying to test.
Then we provide the https://[current ip]:[port] to tell curl that we want to check the response for the above domain name on this ip address and port.
-k will allow curl to ignore any SSL certificate issues if you havent finished transferring the SSL certificates to the server yet.