====== Prepare SD-card ======
Install image to card:

    dd if=<raspian.img> of=/dev/mmcblk0 bs=4M conv=fsync

Boot, connect to host `raspberry` user `pi` password `raspberry`. Change hostname and password. Reboot.

To activate sshd create empty file named `ssh` on boot partition:

    sudo apt update
    sudo apt upgrade
    sudo reboot

====== Python ======

    sudo apt install python-dev
    sudo apt install python-pip
    sudo apt install python-virtualenv

    virtualenv -ppython2.7 env2