Copy images in Nautilus
Install CopyPaste Images extension for Nautilus or Nemo
[Nautilus] Install CopyPaste Images extension for Nautilus by using the Atareao Nautilus Extensions PPA. Add the PPA, install the extension in Ubuntu 14.04 and 15.10, and restart Nautilus, using the following commands:
sudo add-apt-repository ppa:atareao/nautilus-extensions
sudo apt-get update
sudo apt-get install nautilus-copypaste-images
nautilus -q
If you don't want to add the PPA, download the deb (or the source) from HERE.
[Nemo] Atareao has a PPA for Nemo extensions but it doesn't provide the CopyPaste Images extension for Nemo yet. Until the PPA is updated, you can install this extension for Nemo by using the WebUpd8 Nemo PPA (do not add the PPA if you use Linux Mint - I'll post a deb download below). To add the PPA, install the Nemo CopyPaste Images extension and restart Nemo, use the commands below:
sudo add-apt-repository ppa:webupd8team/nemo
sudo apt-get update
sudo apt-get install nemo-copypaste-images
nemo -q
If you don't want to add the PPA, download the extension (either as a deb or source) from HERE.