Binary package “rdesktop” in ubuntu trusty

RDP client for Windows NT/2000 Terminal Server and Windows Servers

 rdesktop is an open source client for Windows NT/2000 Terminal Server and
 Windows Server 2003/2008. Capable of natively speaking its Remote Desktop
 Protocol (RDP) in order to present the user's Windows desktop. Unlike Citrix
 ICA, no server extensions are required.