我从Ubuntu服务器16.04.4 LTS上的官方docker站点安装了Docker CE，版本：16.04，Codename：xenial。即使在我的机器上安装docker之后，我也找不到/var/lib/docker文件。当我尝试运行Ubuntu容器时，例如：
docker run -it ubuntu
错误消息：
docker: Can not connect to the Docker daemon at unix: ///var/run/docker.sock
docker守护程序是否正在运行？
答案 0 :(得分：3)
首先，您必须确定docker服务是否正在运行service docker status
如果它没有运行，请启动它：service docker start
然后您可以使用docker run ....
答案 1 :(得分：0)
请尝试使用sudo：<!DOCTYPE html>
<html lang="en">
<head>
<script src="https://d3js.org/d3.v4.min.js"></script>
<meta charset="utf-8">
<title>D3: Loading data from a CSV file</title>
</head>
<body>
<p>Click on this text to update the chart with new data values (once).</p>
<script type="text/javascript">
var margin = {top: 20, right: 20, bottom: 30, left: 40},
w = 600 - margin.left - margin.right,
h = 300 - margin.top - margin.bottom;
var padding = 40;
var data = [
{ "Food": "Apples", "Deliciousness": 9, "new":4 },
{ "Food": "Green Beans", "Deliciousness": 5, "new":4 },
{ "Food": "Egg Salad Sandwich", "Deliciousness": 4, "new":4 },
{ "Food": "Cookies", "Deliciousness": 10, "new":4 },
{ "Food": "Liver", "Deliciousness": 2, "new":4 },
{ "Food": "Burrito", "Deliciousness": 7, "new":4 },
];
data.forEach(function(d) {
d.Deliciousness = +d.Deliciousness;
});
var svg = d3.select("body")
.append("svg")
.attr("width", w + margin.left + margin.right + padding)
.attr("height", h + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left+"," +
margin.top+")");
//initial state
//scale and axis
var xScale = d3.scaleBand()
.domain(d=>d.Food)
.range([0,w])
.paddingInner(0.2);
xScale.domain(data.map(function(d) { return d.Food; }));
var yScale = d3.scaleLinear()
.domain([0, d3.max(data, d=>d.Deliciousness)])
.rangeRound([h,0]);
var xAxis = d3.axisBottom()
.scale(xScale)
.ticks(5);
var yAxis = d3.axisLeft()
.scale(yScale)
.ticks(5);
//draw rect
svg.selectAll('rect')
.data(data)
.enter()
.append('rect')
.attr('x',(d,i) => margin.left + i * ((w + 20 ) / data.length))
.attr('y',d=>yScale(d.Deliciousness))
.attr('width', xScale.bandwidth())
.attr('height',d =>h-yScale(d.Deliciousness))
.attr('fill',function(d){
if (d===30) return "red";
return "rgb(0,0,"+d.Deliciousness*10+")" ;});
//text label
svg.selectAll("text")
.data(data)
.enter()
.append("text")
.text(d=>d.Deliciousness)
.attr('x',(d,i) => margin.left + i * ((w + 20 ) / data.length) + 0.4*w/ data.length)
.attr("y", d=>yScale(d.Deliciousness)+15)
.attr("fill","white")
.attr("text-anchor", "middle");
//draw axis
svg.append("g")
.attr("class", "axis")
.attr("transform", "translate(" + padding + ",0)")
.call(yAxis);
svg.append("g")
.attr("class", "axis")
.attr("transform", "translate(" + margin.left + "," + h + ")")
.call(xAxis);
//transition
d3.select("p")
.on("click", function() {
//update scale
var yScale = d3.scaleLinear()
.domain([0, d3.max(data, d=>d.new)])
.rangeRound([h,0]);
//Update all rects
svg.selectAll('rect')
.data(data)
.enter()
.append('rect')
.attr('x',(d,i) => margin.left + i * ((w + 20 ) / data.length))
.attr('y',d=>yScale(d.new))
.attr('width', xScale.bandwidth())
.attr('height',d =>h-yScale(d.new))
.attr('fill',function(d){
if (d===30) return "red";
return "rgb(0,0,60)" ;});
});
</script>
</body>
</html>