If you are working on a big website and want to change your server then moving your website manually will take lot’s of time , Suppose your website size is 4GB with code+Mysql database, and you want to move website to other server then simply compress you website using gzip command and copy zip to other server via SSH. I relay found this is a fastest way to copy files form one server to other server.
SSH command to copy files
To copy a file from Server-B to Server-A while logged into Server-B:
scp /path/to/file username@Server-A-IP:/path/to/destination
To copy a file from Server-B to Server-A while logged into Server-A:
scp username@Server-B-IP:/path/to/file /path/to/destination