Copy paste not working on ubuntu putty

You might try adding a Shift to your commands, so Ctrl+Shift+C / V. That is how copy pasting is done in the terminal (Ctrl+C is used to abort terminal commands). Alternatively you can try pasting by pressing Enter or the middle mouse button.

In Ubuntu, you may wish to consider not using PuTTY at all: you can simply ssh using a terminal. For example, if you want to connect to test.server.com, you could simply type:

ssh test.server.com 

If your username is different on the remote system, you can specify it by using this syntax:

ssh remote_username@remote_host

More advanced options are described in the man pages.

Ctrl+Shift+Insert for paste, worked for Ubuntu 12.04 and putty

I found that selecting (left click and drag) would copy, and middle mouse (tap down on scroll wheel) would paste. It worked for me, when adding the shift did not.