message: docs: update apt installation guide for Debian and Ubuntu
  Caffe package is available for APT since Debian 9.0 and Ubuntu 17.04 .
diff: @@ -4,6 +4,34 @@ title: "Installation: Ubuntu"
  # Ubuntu Installation
  +### For Ubuntu (>= 17.04)
  +
  +**Installing pre-compiled Caffe**
  +
  +Everything including caffe itself is packaged in 17.04 and higher versions.
  +To install pre-compiled Caffe package, just do it by
  +
  + sudo apt install caffe-cpu
  +
  +for CPU-only version, or
  +
  + sudo apt install caffe-cuda
  +
  +for CUDA version. Note, the cuda version may break if your NVIDIA driver
  +and CUDA toolkit are not installed by APT.
  +
  +**Installing Caffe from source**
  +
  +We may install the dependencies by merely one line
  +
  + sudo apt build-dep caffe-cpu # dependencies for CPU-only version
  + sudo apt build-dep caffe-cuda # dependencies for CUDA version
  +
  +It requires a `deb-src` line in your `sources.list`.
  +Continue with [compilation](installation.html#compilation).
  +
  +### For Ubuntu (\< 17.04)
  +
  **General dependencies**
  sudo apt-get install libprotobuf-dev libleveldb-dev libsnappy-dev libopencv-dev libhdf5-serial-dev protobuf-compiler
  