メモ（導入したdocker,kubeadm類の削除など）

sudo rm /var/lib/apt/lists/lock

sudo rm /var/lib/dpkg/lock

sudo rm  /var/cache/apt/archives/lock

sudo apt-get -y --purge autoremove apt-transport-https ca-certificates curl software-properties-common

sudo apt-get -y --purge autoremove docker-ce

sudo apt-get -y --purge autoremove kubelet kubeadm kubectl

参照先：

http://inside-my-box.hatenablog.com/entry/2015/05/29/013008