From Linux command-line:

  desktop> scp myfile <username>@<hostname>:myfiletoo

or — N.B. ":"

  desktop> scp myfile <username>@<hostname>:

From Linux GUI:

• GNOME: gFTP;
• KDE: Konqueror, e.g., sftp://mace01.mace.manchester.ac.uk

From MS Windows:

• Use WinSCP.

More

• More on SSH, SCP and SFTP.
• Or, use a network-transparent editor. . .