urxvt-unicode commonly known as rxvt, is a color VT102 terminal emulator for X windows systems. urxvt was written by Marc Lehmann in 2003. urxvt can run in daemon mode, that is, it reduces memory usage and loading during terminal usage.
Ubuntu.
sudo apt-get install rxvt-unicode-256color ncurses-term
git clone https://github.com/muennich/urxvt-perls
mv urxvt-perls/{clipboard,keyboard-select,url-select} /usr/lib/urxvt/perls
Arch.
yaourt -S rxvt-unicode-patched urxvt-perls
or
pacman -Sy rxvt-unicode
on ubuntu the file is in ~/.Xdefaults, while in arch linux it is ~/.Xresources. if it doesn't exist in ubuntu or arch, you first create the file.
Ubuntu.
sudo xrdb ~/.Xdefaults
Arch.
sudo xrdb ~/.Xresources