'apt-get dist-upgrade' get error message 'Job for docker.service failed because the control process exited with error code.' after upgrade ubuntu kernel
referenece: [graphdriver] prior storage driver "aufs" failed: invalid argument 精簡版 1. aufs is no longer supported on Ubuntu kernel 4.* 2. trick is 'rm -rf /var/lib/docker/aufs' 3. sudo service docker start 完整操作過程