#Remote to local
$scp remote_user@remote_host:/path/to/remote/file /path/to/local/file
#Local to remote
$scp /path/to/local/file remote_user@remote_host:/path/to/remote/file
Basics (with ssh key)
$scp -r -i YOUR_certificat.priv root@172.16.0.xxx:/SOURCE/* /DESTINATION/