sudo systemctl stop docker
sudo docker info | grep "Docker Root Dir"
cp -a /var/lib/docker /opt/data/
mv -u /var/lib/docker /var/lib/docker.bak
sudo ln -fs /opt/data/docker /var/lib/docker
sudo systemctl start docker
sudo systemctl stop docker
sudo docker info | grep "Docker Root Dir"
cp -a /var/lib/docker /opt/data/
mv -u /var/lib/docker /var/lib/docker.bak
sudo ln -fs /opt/data/docker /var/lib/docker
sudo systemctl start docker
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