离线安装docker发生报错：Failed to start docker.service: Unit docker.service not found.

vi /etc/systemd/system/docker.service

[Unit]

[Service]

Type=notify

ExecStart=/usr/bin/dockerd

ExecReload=/bin/kill -s HUP $MAINPID

Restart=always

StartLimitBurst=3

StartLimtInterval=60s

[Install]

WantedBy=multi-user.target

systemctl daemon-reload

systemctl start docker

docker ps

docker run hello-world

已解决