To transfer file securely between 2 Linux server with scp command
scp -P 22 *.* root@remoteserver.com:/root/
-P 22 = using port 22. If you have change the sshd port, you must change this accordingly
*.* = all the file inside the working directory
root@remoteserver.com = the user and the remote server
:/root/ = the location where the file should save to
