This question already has an answer here:
- Clipboard manager for 12.04 Unity 3 answers
I occasionally clobber whatever I had already copied to the clipboard. It would rock to just be able to keep all of my clipboard history right in front of me.
I use parcellite.
You can install it from Ubuntu repository by doing this command in terminal:
I would recommend glippy if you want a clipboard manager that also supports images that were copied.