Доустановим требуемые пакеты:
Ubuntu:
sudo apt-get install libx11-dev libgstreamer0.10-dev libpcre3-dev libenchant-dev libxosd-dev libnotify-dev libglade2-dev libgconf2-dev
Fedora:
sudo yum install libX11-devel gstreamer-devel pcre-devel enchant-devel xosd-devel libnotify-devel
Скачаем и установим из исходников, поочередно выполняя следующие команды:
wget https://launchpad.net/~andrew-crew-kuznetsov/+archive/xneur-stable/+files/xneur_0.17.0.orig.tar.gz
wget https://launchpad.net/~andrew-crew-kuznetsov/+archive/xneur-stable/+files/gxneur_0.17.0.orig.tar.gz
tar -xzvf xneur_0.17.0.orig.tar.gz
tar -xzvf gxneur_0.17.0.orig.tar.gz
cd xneur-0.17.0
./configure
sudo make install clean
cd ../gxneur-0.17.0
./configure
sudo make install clean
sudo ldconfig