MarshalW

// from http://stackoverflow.com/questions/36934749/how-to-get-the-output-of-a-spawned-child-process-in-node-js

var spawn = require('child_process').spawn;
// Create a child process
var child = spawn('dd', ['if=/dev/zero','of=/tmp/test1.img','bs=100m','count=1','conv=noerror,sync']);

child.stdout.on('data',
    function(data) {
        console.log('ls command output: ' + data);
    });

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},

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{
  "$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},

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服务器端：

iperf3 -s

客户端：

iperf3 -u -c tank -b 100M

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在 Raspbian 监控 cpu温度

命令行：

watch 'head -n 1 /sys/class/thermal/thermal_zone0/temp | xargs -I{} awk "BEGIN {printf \"%.2f\n\", {}/1000}"'

或者：

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

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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

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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