MarshalW

var mqtt = require('mqtt');

//{'topicName':[clientObj,clientObj ..]}
var subscribeTopics={};

//创建服务器对象
var server = mqtt.createServer(function(client) {

  //建立连接时触发
  client.on('connect', function(packet) {

MarshalW

1001  git init
1003  git remote add origin git@github.com:YourUserName/ProjectName.git
1004  git fetch origin
1006  git checkout master

MarshalW

如何追加公钥到目标服务器

命令：

cat id_rsa.pub | ssh target_host "sudo tee -a /home/tom/.ssh/authorized_keys"

MarshalW

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "width": 400,
  "height": 200,
  "data": [
    {
      "name": "table",
      "values": [
        {"date": "2020-08-01", "count": 2109},
        {"date": "2020-08-02", "count": 1201},

MarshalW

{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "data": {
    "values":[
      {"date": "2020-08-01", "retention":2341},
      {"date": "2020-08-02", "retention":1234},
      {"date": "2020-08-03", "retention":1101},
      {"date": "2020-08-04", "retention":998},
      {"date": "2020-08-05", "retention":543},
      {"date": "2020-08-06", "retention":589},

MarshalW

服务器端：

iperf3 -s

客户端：

iperf3 -u -c tank -b 100M

MarshalW

ansible-playbook将a服务器ssh key设置到b服务器

playbook.yml:

---
- hosts: a
  gather_facts: no
  tasks:
 - name: get ssh key

MarshalW

使用ssh实现socks5代理

在linux和macOS下此命令有效：

ssh -D 1337 -q -C -N your_server

• 假设本地用户ssh key已经设置到your_server
• 本地1337端口即socks5代理的端口

MarshalW

清除所有screen session的命令

以下命令，macos下测试有效：

screen -ls | grep Detached | cut -d. -f1 | awk '{print $1}' | xargs kill

MarshalW

华为S5700交换机恢复出厂设置

连接设备

需要连接上一条免驱动的console rj45转usb的连接线。

查看设备：

ls /dev/ | grep usb