I have recently installed the i3 tiling window manager  on my Ubuntu system and I'm trying to figure out how to copy & paste between various terminal and application windows.
How can this be done?
Some terminals use
CTRL+SHIFT+V to copy and paste, while others use
urxvt (See https://wiki.archlinux.org/index.php/Rxvt-unicode#Cut_and_paste ).
i3wm, try using a clipboard manager, like
sudo apt-get update sudo apt-get install clipit
exec --no-startup-id clipit to
~/.i3/config to start it automatically.
I have just had success using the
middle mouse button with xterm in i3 to copy from a remote terminal to firefox. Use the
middle mouse button to copy and paste.
xfce4-terminal which pretty much does exactly what I need.
sudo apt-get install xfce4-terminal
You have had good answers above, I will just add a detail. As a default, the clipboard of each container is emptied when the container is closed. So if you copy some text from a terminal, close the terminal, and paste the text in another terminal - it will not work, because the clipboard will have been emptied in the meanwhile.
I don't use that myself, but your copy buffer might be accessible through ctrl +shift+c to copy and v to paste. These is also programs like
xclipboard for capturing output of terminal commands into a clipboard. Try it out, report back!