In Windows I used command-line clipboard copy-and-paste utilities...
These were UnixUtils ports for Windows (but they only handled plain text). There were a couple of other native Windows utilities which could write/extract any format.
I've looked for something similar in Synaptic Package Manager, but I can't find anything.
Is there something there, that I've missed? ... or maybe this is available in Bash scripting?
The type of utility I'd like will be able to read/write via std-in/std-out or file-in/file-out, and handle Unicode, Rich Text Format, picture, etc. clipboard formats...
NB: I'm not after a clipboard manager.