Helper with ROS, ssh, card dump on Raspberry

Dump sd card

sudo ddrescue /dev/mmcblk0 saveRaspi2trustyandROSlast.img -S --size=14080M
sudo ddrescue saveRaspi2trustyandROSlast.img /dev/mmcblk0 -f

Install ROS

sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-key 0xB01FA116
sudo apt-get update
sudo apt-get install ros-kinetic-ros-base
sudo rosdep init
rosdep update
echo "source /opt/ros/kinetic/setup.bash" >> ~/.bashrc

SSH server

Install ssh server:

sudo apt install openssh-server
sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.original

Configure: sudo nano /etc/ssh/sshd_config Add :

PubkeyAuthentication yes

and finally restart service:

sudo systemctl restart sshd.service

For info here