How to check website work after migration?

To check website work without DNS changing you can use the hosts file. 

111.222.333.444 domain.com

where,

111.222.333.444 - ip-address of your server (you can find it in email with control panel access details);

domain.com - your domain.

You can find hosts file on your personal computer depending on your operating system:

- Windows XP/2003/Vista/7: WINDOWS\system32\drivers\etc\hosts 

- Windows NT/2000: WINNT\system32\drivers\etc\hosts 

- Windows 95/98/ME: WINDOWS\hosts 

- Mac OS X 10.2+: /private/etc/hosts 

- Linux: /etc/hosts 

Note,  after this changes if you open website  domain.com at your browser and see the website version that you have transferred! 

If you finish website check do not forget to delete this record from the hosts file.