Transfer files over scp

Some times you like to transfer files to other computer, without a USB or portable HDD. If you know the IP you can start a Secure Copy Protocol on UNIX machines it is just like the cp command but then a secure for over network (it also possible to transfer local but a little stupid not? )

 $ scp  path/to/local/file        username@0.0.0.0:location/external/file-system

Afer this you ran this command can do a md5sum check to see if the tranfer was success full 

 $ md5sum path/to/file