feat: add cron cheatsheet.

This commit is contained in:
jaywcjlove 2022-09-26 22:14:52 +08:00
parent 697d00f277
commit 089b1eaf39
8 changed files with 226 additions and 72 deletions

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@ -3,9 +3,9 @@ Quick Reference
为开发人员分享快速参考备忘单(主要是方便自己),在看到 [Reference](https://github.com/Randy8080/reference) 快速参考备忘单,感觉非常简单,造轮子使命感突然来了,造个中文版本的,为了方便自己的技术栈查阅,立马撸起来 :)。 为开发人员分享快速参考备忘单(主要是方便自己),在看到 [Reference](https://github.com/Randy8080/reference) 快速参考备忘单,感觉非常简单,造轮子使命感突然来了,造个中文版本的,为了方便自己的技术栈查阅,立马撸起来 :)。
如果您发现此处的备忘单不合适,您可以通过提交 PR 来修复它或提供更好的备忘单,只针对【中文】用户。 如果您发现此处的备忘单不合适,您可以通过提交 PR 来修复它或提供更好的备忘单,只针对【中文】用户。
以下是开源天使提供的一些备忘单和快速参考 :)。 以下是开源天使提供的一些备忘单和快速参考 :)。
## 编程 ## 编程
@ -18,6 +18,10 @@ Quick Reference
[VSCode](./docs/vscode.md) [VSCode](./docs/vscode.md)
## Linux 命令
[Cron](./docs/cron.md)
## License ## License
MIT © [Kenny Wong](https://github.com/jaywcjlove) MIT © [Kenny Wong](https://github.com/jaywcjlove)

104
docs/cron.md Normal file
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@ -0,0 +1,104 @@
Cron 备忘清单
===
[Cron](https://en.wikipedia.org/wiki/Cron) 最适合安排重复性任务。 可以使用关联的 at 实用程序来完成一次性任务的调度。
Crontab 格式
------
<!--rehype:body-class=cols-2-->
### 格式
```
Min Hour Day Mon Weekday
分钟 小时 天 月 周
```
-------
```
* * * * * 要执行的命令
┬ ┬ ┬ ┬ ┬
│ │ │ │ └─ 星期几 (0=周日 .. 6=星期六)
│ │ │ └────── 月 (1..12)
│ │ └─────────── 月份中的某天 (1..31)
│ └──────────────── 小时 (0..23)
└───────────────────── 分钟 (0..59)
```
------
| 字段 | 范围 | 特殊字符 |
|--------------|--------|--------------------|
| 分钟 Minute | 0 - 59 | , - * / |
| 小时 Hour | 0 - 23 | , - * / |
| 月份中的某天 | 1 - 31 | , - * ? / L W |
| 月 Month | 1 - 12 | , - * / |
| 星期几 | 0 - 6 | , - * ? / L # |
### 示例
| Example | Description |
|----------------|------------------------|
| `*/15 * * * *` | 每 15 分钟 |
| `0 * * * *` | 每隔一小时 |
| `0 */2 * * *` | 每 2 小时 |
| `15 2 * * *` | 每天凌晨 2 点 15 分 |
| `15 2 * * ?` | 每天凌晨 2 点 15 分 |
| `10 9 * * 5` | 每周五上午 9:10 |
| `0 0 * * 0` | 每个星期日的午夜 |
| `15 2 * * 1L` | 每月最后一个星期一凌晨 2 点 15 分 |
| `15 0 * * 4#2` | 每个月的第二个星期四早上 00:15 |
| `0 0 0 1 * *` | 每个月的 1 日(每月) |
| `0 0 0 1 1 *` | 每年 1 月 1 日(每年) |
| `@reboot` | 每次重启 _(非标准)_ |
<!--rehype:class=table-thead-hide-->
### 特殊字符串
| 特殊字符串 | 意义 |
|----------------|----------------------------------------------------|
| @reboot | 运行一次,在系统启动时 _非标准_ |
| @yearly | 每年运行一次“0 0 1 1 *” _非标准_ |
| @annually | (与@yearly 相同_非标准_ |
| @monthly | 每月运行一次“0 0 1 * *_非标准_ |
| @weekly | 每周运行一次“0 0 * * 0” _非标准_ |
| @daily | 每天运行一次“0 0 * * *” _非标准_ |
| @midnight | (与@daily 相同_非标准_ |
| @hourly | 每小时运行一次“0 * * * *_非标准_ |
### Crontab 命令
| - | - |
|--------------|---------------------------------------------|
| `crontab -e` | 如果不存在,则编辑或创建一个 crontab 文件。 |
| `crontab -l` | 显示 crontab 文件。 |
| `crontab -r` | 删除 crontab 文件。 |
| `crontab -v` | 显示您上次编辑 crontab 文件的时间。 _非标准_ |
<!--rehype:class=table-thead-hide-->
### 特殊字符
<!--rehype:warp-class=col-span-2-->
<!--rehype:-->
| 特殊字符 | 说明 |
|---------------------|------------------------------------------------------------------------------------------|
| `Asterik(*)` | 匹配字段中的所有值或任何可能的值。 |
| `Hyphen(-)` | 用于定义范围。例如:第 5 个字段(星期几)中的 1-5 每个工作日,即星期一到星期五 |
| `Slash (/)` | 第一个字段(分钟)/15 表示每十五分钟或范围的增量。 |
| `Comma (,)` | 用于分隔项目。例如:第二个字段(小时)中的 2、6、8 在凌晨 2 点、早上 6 点和早上 8 点执行 |
| `L` | 仅允许用于 `月份中的某天``星期几` 字段,`星期几` 中的 `2L` 表示每个月的最后一个星期二 |
| `Hash (#)` | 仅允许用于 `星期几` 字段,后面必须在 1 到 5 的范围内。例如,`4#1` 表示给定月份的“第一个星期四”。 |
| `Question mark (?)` | 可以代替“*”并允许用于月份和星期几。使用仅限于 cron 表达式中的 `月份中的某天``星期几`。 |
## Also see
* [Devhints](https://devhints.io/cron) _(devhints.io)_
* [Crontab Generator](https://crontab-generator.org/) _(crontab-generator.org)_
* [Crontab guru](https://crontab.guru/) _(crontab.guru)_

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@ -1053,7 +1053,7 @@ module.exports = {
} }
``` ```
### Require Module ### 加载模块
```javascript ```javascript
// main.js // main.js
@ -1068,7 +1068,7 @@ JavaScript Promises
---- ----
<!--rehype:data-body-style=grid-template-columns: repeat(2,minmax(0,1fr));--> <!--rehype:data-body-style=grid-template-columns: repeat(2,minmax(0,1fr));-->
### Promise states ### Promise 状态
<!--rehype:data-warp-style=grid-row: span 2/span 2;--> <!--rehype:data-warp-style=grid-row: span 2/span 2;-->
<!--rehype:--> <!--rehype:-->
@ -1086,7 +1086,7 @@ const promise = new Promise((resolve, reject) => {
promise.then((res) => console.log(res), (err) => console.error(err)); promise.then((res) => console.log(res), (err) => console.error(err));
``` ```
### Executor function ### 执行器函数
```javascript ```javascript
const executorFn = (resolve, reject) => { const executorFn = (resolve, reject) => {
@ -1104,7 +1104,7 @@ const loginAlert = () =>{
setTimeout(loginAlert, 6000); setTimeout(loginAlert, 6000);
``` ```
### .then() method ### .then() 方法
```javascript ```javascript
const promise = new Promise((resolve, reject) => { const promise = new Promise((resolve, reject) => {
@ -1119,7 +1119,7 @@ promise.then((res) => {
}); });
``` ```
### .catch() method ### .catch() 方法
```javascript ```javascript
const promise = new Promise((resolve, reject) => { const promise = new Promise((resolve, reject) => {
@ -1154,7 +1154,7 @@ Promise.all([promise1, promise2]).then((res) => {
}); });
``` ```
### Avoiding nested Promise and .then() ### 避免嵌套的 Promise 和 .then()
```javascript ```javascript
const promise = new Promise((resolve, reject) => { const promise = new Promise((resolve, reject) => {
@ -1171,11 +1171,11 @@ const oneDot = (star) => {
const print = (val) => { const print = (val) => {
console.log(val); console.log(val);
}; };
// Chaining them all together // 将它们链接在一起
promise.then(twoStars).then(oneDot).then(print); promise.then(twoStars).then(oneDot).then(print);
``` ```
### Creating ### 创建
```javascript ```javascript
const executorFn = (resolve, reject) => { const executorFn = (resolve, reject) => {
@ -1184,7 +1184,7 @@ const executorFn = (resolve, reject) => {
const promise = new Promise(executorFn); const promise = new Promise(executorFn);
``` ```
### Chaining multiple .then() ### 链接多个 .then()
```javascript ```javascript
const promise = new Promise(resolve => setTimeout(() => resolve('dAlan'), 100)); const promise = new Promise(resolve => setTimeout(() => resolve('dAlan'), 100));
@ -1201,7 +1201,7 @@ JavaScript Async-Await
---- ----
<!--rehype:data-body-style=grid-template-columns: repeat(2,minmax(0,1fr));--> <!--rehype:data-body-style=grid-template-columns: repeat(2,minmax(0,1fr));-->
### Asynchronous ### 异步
```javascript ```javascript
function helloWorld() { function helloWorld() {
@ -1211,19 +1211,19 @@ function helloWorld() {
}, 2000); }, 2000);
}); });
} }
const msg = async function() { //Async Function Expression const msg = async function() { // 异步函数表达式
const msg = await helloWorld(); const msg = await helloWorld();
console.log('Message:', msg); console.log('Message:', msg);
} }
const msg1 = async () => { //Async Arrow Function const msg1 = async () => { // 异步箭头函数
const msg = await helloWorld(); const msg = await helloWorld();
console.log('Message:', msg); console.log('Message:', msg);
} }
msg(); // Message: Hello World! <-- after 2 seconds msg(); // Message: Hello World! <-- 2 秒后
msg1(); // Message: Hello World! <-- after 2 seconds msg1(); // Message: Hello World! <-- 2 秒后
``` ```
### Resolving Promises ### 解决 Promises
```javascript ```javascript
let pro1 = Promise.resolve(5); let pro1 = Promise.resolve(5);
@ -1237,7 +1237,7 @@ Promise.all([pro1, pro2, pro3]).then(function(values) {
// expected => Array [5, 44, "foo"] // expected => Array [5, 44, "foo"]
``` ```
### Async Await Promises ### 异步等待 Promises
```javascript ```javascript
function helloWorld() { function helloWorld() {
@ -1251,22 +1251,22 @@ async function msg() {
const msg = await helloWorld(); const msg = await helloWorld();
console.log('Message:', msg); console.log('Message:', msg);
} }
msg(); // Message: Hello World! <-- after 2 seconds msg(); // Message: Hello World! <-- 2 秒后
``` ```
### Error Handling ### 错误处理
```javascript ```javascript
let json = '{ "age": 30 }'; // incomplete data let json = '{ "age": 30 }'; // 数据不完整
try { try {
let user = JSON.parse(json); // <-- no errors let user = JSON.parse(json); // <-- 没有错误
console.log( user.name ); // no name! console.log( user.name ); // no name!
} catch (e) { } catch (e) {
console.error( "Invalid JSON data!" ); console.error( "Invalid JSON data!" );
} }
``` ```
### Aysnc await operator ### 异步等待运算符
```javascript ```javascript
function helloWorld() { function helloWorld() {
@ -1280,7 +1280,7 @@ async function msg() {
const msg = await helloWorld(); const msg = await helloWorld();
console.log('Message:', msg); console.log('Message:', msg);
} }
msg(); // Message: Hello World! <-- after 2 seconds msg(); // Message: Hello World! <-- 2 秒后
``` ```
JavaScript 请求 JavaScript 请求
@ -1402,7 +1402,7 @@ fetch('https://api-xxx.com/endpoint', {
}) })
``` ```
### async await syntax ### async await 语法
<!--rehype:data-warp-style=grid-column: span 2/span 2;--> <!--rehype:data-warp-style=grid-column: span 2/span 2;-->
<!--rehype:--> <!--rehype:-->

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@ -1,43 +1,3 @@
import fs from 'fs-extra'; import { run } from './index.mjs';
import path from 'path';
import recursiveReaddirFiles from 'recursive-readdir-files';
import { create } from './create.mjs';
const OUTOUT = path.resolve(process.cwd(), 'dist'); run()
const DOCS = path.resolve(process.cwd(), 'docs');
const CSSPATH = path.resolve(process.cwd(), 'scripts/style.css');
const CSS_OUTPUT_PATH = path.resolve(OUTOUT, 'style/style.css');
async function createHTML(files = [], num = 0) {
const dataFile = files[num];
if (!dataFile) {
console.log('\ndone!')
return;
}
++num;
const mdstr = await fs.readFile(dataFile.path);
const htmlPath = path.relative(DOCS, dataFile.path);
const outputHTMLPath = path.resolve(OUTOUT, 'docs', htmlPath).replace(/README.md$/i, 'index.html').replace(/.md$/, '.html');
await fs.ensureDir(path.dirname(outputHTMLPath));
const html = create(mdstr.toString(), {
css: [path.relative(path.dirname(outputHTMLPath), CSS_OUTPUT_PATH)]
});
await fs.writeFile(outputHTMLPath, html);
console.log(`♻️ \x1b[32;1m ${path.relative(OUTOUT, outputHTMLPath)} \x1b[0m`)
createHTML(files, num)
}
;(async () => {
await fs.ensureDir(OUTOUT);
await fs.emptyDir(OUTOUT);
await fs.ensureDir(path.dirname(CSS_OUTPUT_PATH));
await fs.copyFile(CSSPATH, CSS_OUTPUT_PATH)
const files = await recursiveReaddirFiles(process.cwd(), {
ignored: /\/(node_modules|\.git)/,
exclude: /(\.json|mjs)$/,
filter: (item) => item.ext === 'md',
});
createHTML(files);
})();

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@ -3,6 +3,7 @@ import rehypeDocument from 'rehype-document';
import rehypeFormat from 'rehype-format'; import rehypeFormat from 'rehype-format';
import { rehypeUrls } from './nodes/rehypeUrls.mjs'; import { rehypeUrls } from './nodes/rehypeUrls.mjs';
import { htmlTagAddAttri } from './nodes/htmlTagAddAttri.mjs'; import { htmlTagAddAttri } from './nodes/htmlTagAddAttri.mjs';
import { footer } from './nodes/footer.mjs';
/** 标记 Number */ /** 标记 Number */
function panelAddNumber(arr = [], result = []) { function panelAddNumber(arr = [], result = []) {
@ -61,10 +62,10 @@ export function getTocsTree(arr = [], result = []) {
if (level === 1) warpCls.push('max-container'); if (level === 1) warpCls.push('max-container');
const warpStyle = toc.properties['data-warp-style']; const warpStyle = toc.properties['data-warp-style'];
const bodyStyle = toc.properties['data-body-style'];
delete toc.properties['data-warp-style'] delete toc.properties['data-warp-style']
delete toc.properties['data-body-style'] const warpClass = toc.properties['warp-class'];
if (warpClass) warpCls.push(warpClass);
delete toc.properties['warp-class'];
const panle = { const panle = {
type: 'element', type: 'element',
tagName: 'div', tagName: 'div',
@ -91,10 +92,15 @@ export function getTocsTree(arr = [], result = []) {
const childs = getChilds([...data.slice(n + 1)], level); const childs = getChilds([...data.slice(n + 1)], level);
const resultChilds = getTocsTree(childs); const resultChilds = getTocsTree(childs);
if (resultChilds.length > 0) { if (resultChilds.length > 0) {
const bodyStyle = toc.properties['data-body-style'];
delete toc.properties['data-body-style']
const bodyClass = toc.properties['body-class'];
delete toc.properties['body-class']
panle.children = panle.children.concat({ panle.children = panle.children.concat({
type: 'element', type: 'element',
tagName: 'div', tagName: 'div',
properties: { class: `h${level}warp-body`, style: bodyStyle }, properties: { class: [`h${level}warp-body`, bodyClass], style: bodyStyle },
children: [...resultChilds] children: [...resultChilds]
}); });
} }
@ -126,6 +132,7 @@ export function create(str = '', options = {}) {
rehypeUrls(node); rehypeUrls(node);
if (node.type === 'element' && node.tagName === 'body') { if (node.type === 'element' && node.tagName === 'body') {
node.children = getTocsTree([ ...node.children ]); node.children = getTocsTree([ ...node.children ]);
node.children.push(footer());
} }
} }
} }

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@ -0,0 +1,43 @@
import fs from 'fs-extra';
import path from 'path';
import recursiveReaddirFiles from 'recursive-readdir-files';
import { create } from './create.mjs';
const OUTOUT = path.resolve(process.cwd(), 'dist');
const DOCS = path.resolve(process.cwd(), 'docs');
const CSSPATH = path.resolve(process.cwd(), 'scripts/style.css');
const CSS_OUTPUT_PATH = path.resolve(OUTOUT, 'style/style.css');
async function createHTML(files = [], num = 0) {
const dataFile = files[num];
if (!dataFile) {
console.log('\ndone!')
return;
}
++num;
const mdstr = await fs.readFile(dataFile.path);
const htmlPath = path.relative(DOCS, dataFile.path);
const outputHTMLPath = path.resolve(OUTOUT, 'docs', htmlPath).replace(/README.md$/i, 'index.html').replace(/.md$/, '.html');
await fs.ensureDir(path.dirname(outputHTMLPath));
const html = create(mdstr.toString(), {
css: [path.relative(path.dirname(outputHTMLPath), CSS_OUTPUT_PATH)]
});
await fs.writeFile(outputHTMLPath, html);
console.log(`♻️ \x1b[32;1m ${path.relative(OUTOUT, outputHTMLPath)} \x1b[0m`)
createHTML(files, num)
}
export async function run() {
await fs.ensureDir(OUTOUT);
await fs.emptyDir(OUTOUT);
await fs.ensureDir(path.dirname(CSS_OUTPUT_PATH));
await fs.copyFile(CSSPATH, CSS_OUTPUT_PATH)
const files = await recursiveReaddirFiles(process.cwd(), {
ignored: /\/(node_modules|\.git)/,
exclude: /(\.json|mjs)$/,
filter: (item) => item.ext === 'md',
});
createHTML(files);
}

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@ -0,0 +1,22 @@
export function footer() {
return {
type: 'element',
tagName: 'footer',
properties: {
class: 'footer-warp',
},
children: [
{
type: 'element',
tagName: 'footer',
properties: {
class: ['max-container'],
},
children: [
{ type: 'text', value: '© 2022 Kenny Wang, All rights reserved.' }
],
}
],
};
}

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@ -288,6 +288,13 @@ pre {
overflow-x: auto; overflow-x: auto;
} }
.cols-2 {
grid-template-columns: repeat(2,minmax(0,1fr));
}
.col-span-2 {
grid-column: span 2/span 2;
}
[data-color-mode*='light'], [data-color-mode*='light'] body { [data-color-mode*='light'], [data-color-mode*='light'] body {
--color-prettylights-syntax-comment: #6e7781; --color-prettylights-syntax-comment: #6e7781;
--color-prettylights-syntax-constant: #0550ae; --color-prettylights-syntax-constant: #0550ae;
@ -448,3 +455,10 @@ pre {
.token.entity { cursor: help; } .token.entity { cursor: help; }
/* 代码高亮 End */ /* 代码高亮 End */
.footer-warp {
margin-top: 3.5rem;
color: rgb(100 116 139/1);
background-color: rgb(30 41 59/1);
}