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\[\sum_{i=0}^n i^2=\frac{(n^2+n)(2n+1)}{6} \tag{1}\]

相对论公式:”\(E = mc^2\),这样,\(x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\),aaaa,\(x=\sum_{i=0}^n i^2=\frac{(n^2+n)(2n+1)}{6}\),aaa

\[\begin{matrix} 1 & x & x^2 \\ 1 & y & y^2 \\ 1 & z & z^2 \\ \end{matrix}\]
graph TD
    A[Enter Chart Definition] --> B(Preview)
    B --> C{decide}
    C --> D[Keep]
    C --> E[Edit Definition]
    E --> B
    D --> F[Save Image and Code]
    F --> B

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

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📖 Reference - Cheat Sheets for Developers

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Reference is a collection of cheat sheets contributed by open source angels. It shares a quick reference cheat sheet for developers in a nice layout. [ 中文版 … ]

We encourage you to share your own cheat sheets with the community and make Reference even better. If you notice a cheat sheet that could be improved, feel free to submit a pull request.

👀 Live Demonstration

You can view the cheat sheets live at https://cheatsheets.zip

Quick reference

📚 Cheat Sheets List

Reference provides cheat sheets for the following:

Programming - [Kubernetes](https://cheatsheets.zip/kubernetes.html): This page contains a list of commonly used kubectl commands and flags. - [ES6](https://cheatsheets.zip/es6.html): A quick reference cheat sheet of what's new in JavaScript for ES2015, ES2016, ES2017, ES2018 and beyond
Toolkit - [ChatGPT](https://cheatsheets.zip/chatgpt.html): This cheat sheet lists out prompts and tips from all over the world on how to use ChatGPT effectively - [VSCode](https://cheatsheets.zip/vscode.html): This VSCode (Visual Studio Code) quick reference cheat sheet shows its keyboard shortcuts and commands. - [Mitmproxy](https://cheatsheets.zip/mitmproxy.html): [mitmproxy](https://mitmproxy.org/) is a free and open source interactive HTTPS proxy. This is a quick reference cheat sheet to the mitmproxy. - [XPath](https://cheatsheets.zip/xpath.html): This is an [XPath](https://en.wikipedia.org/wiki/XPath) selectors cheat sheet, which lists commonly used XPath positioning methods and CSS selectors - [Emacs](https://cheatsheets.zip/emacs.html): [Emacs](https://www.gnu.org/software/emacs) is the extensible, customizable, self-documenting real time display text editor. This reference was made for Emacs 27. - [Emmet](https://cheatsheets.zip/emmet.html): [Emmet](https://emmet.io/) is a web-developer’s toolkit for boosting HTML & CSS code writing, which allows you to write large HTML code blocks at speed of light using well-known CSS selectors. - [RegEX](https://cheatsheets.zip/regex.html): A quick reference for regular expressions (regex), including symbols, ranges, grouping, assertions and some sample patterns to get you started. - [Vim](https://cheatsheets.zip/vim.html): A useful collection of [Vim](http://www.vim.org/) 8.2 quick reference cheat sheets to help you learn vim editor faster.
Linux Command - [Curl](https://cheatsheets.zip/curl.html): This [Curl](https://github.com/curl/curl) cheat sheet contains commands and examples of some common Curl tricks. - [PM2](https://cheatsheets.zip/pm2.html): [PM2] is a daemon process manager that will help you manage and keep your application online. Getting started with PM2 is straightforward, it is offered as a simple and intuitive CLI. - [Chmod](https://cheatsheets.zip/chmod.html): This quick reference cheat sheet provides a brief overview of file permissions, and the operation of the chmod command - [Tmux](https://cheatsheets.zip/tmux.html): The tmux cheat sheet quick reference of most commonly used shortcuts and commands - [Lsof](https://cheatsheets.zip/lsof.html): This quick reference cheat sheet provides various for using lsof command. - [SSH](https://cheatsheets.zip/ssh.html): This quick reference cheat sheet provides various for using SSH. - [Netstat](https://cheatsheets.zip/netstat.html): This quick reference cheat sheet provides various for using netstat command. - [Screen](https://cheatsheets.zip/screen.html): This is a quick reference guide cheat sheet for the screen command. - [Awk](https://cheatsheets.zip/awk.html): This is a one page quick reference cheat sheet to the [GNU awk](https://www.gnu.org/software/gawk/manual/gawk.html), which covers commonly used awk expressions and commands. - [Find](https://cheatsheets.zip/find.html): This is a quick reference list of cheat sheet for linux find command, contains common options and examples. - [Sed](https://cheatsheets.zip/sed.html): [Sed](https://www.gnu.org/software/sed/manual/sed.html) is a stream editor, this sed cheat sheet contains sed commands and some common sed tricks. - [Cron](https://cheatsheets.zip/cron.html): [Cron](https://en.wikipedia.org/wiki/Cron) is most suitable for scheduling repetitive tasks. Scheduling one-time tasks can be accomplished using the associated at utility. - [Git](https://cheatsheets.zip/git.html): This cheat sheet summarizes commonly used Git command line instructions for quick reference. - [Grep](https://cheatsheets.zip/grep.html): This cheat sheet is intended to be a quick reminder for the main concepts involved in using the command line program grep and assumes you already understand its usage. - [Netcat](https://cheatsheets.zip/nc.html): This cheat sheet provides various for using Netcat on both Linux and Unix. - [Taskset](https://cheatsheets.zip/taskset): This quick reference cheat sheet for tasket command.
Python - [Numpy](https://cheatsheets.zip/numpy.html): [NumPy](https://numpy.org/) is the fundamental package for scientific computing with Python. This cheat sheet is a quick reference for NumPy beginners.
Database - [Neo4j](https://cheatsheets.zip/neo4j.html): A Neo4j cheat sheet with getting started resources and information on how to query the database with Cypher. - [PostgreSQL](https://cheatsheets.zip/postgres.html): The [PostgreSQL](https://www.postgresql.org/docs/current/) cheat sheet provides you with the common PostgreSQL commands and statements. - [Redis](https://cheatsheets.zip/redis.html): This is a [redis](https://redis.io/) quick reference cheat sheet that lists examples of redis commands - [MySQL](https://cheatsheets.zip/mysql.html): The SQL cheat sheet provides you with the most commonly used SQL statements for your reference.
Keyboard Shortcuts - [Adobe Photoshop](https://cheatsheets.zip/adobe-photoshop.html): A visual cheat-sheet for the 283 keyboard shortcuts found in Adobe Photoshop - [Apex Legends](https://cheatsheets.zip/apex-legends.html): A visual cheat-sheet for the 27 default keyboard shortcuts found in Apex Legends - [Figma](https://cheatsheets.zip/figma.html): A visual cheat-sheet for the 119 keyboard shortcuts found in Figma - [Microsoft Teams](https://cheatsheets.zip/microsoft-teams.html): A visual cheat-sheet for the 38 keyboard shortcuts found in Microsoft Teams - [TablePlus](https://cheatsheets.zip/table-plus.html): A visual cheat-sheet for the 34 keyboard shortcuts found in TablePlus - [Bear](https://cheatsheets.zip/bear-notes.html): A visual cheat-sheet for the 66 keyboard shortcuts found in Bear. This application is MacOS-only. - [Feedly](https://cheatsheets.zip/feedly.html): A visual cheat-sheet for the 25 keyboard shortcuts found on the Feedly app - [FileZilla](https://cheatsheets.zip/filezilla.html): A visual cheat-sheet for the 30 keyboard shortcuts found on the FileZilla program - [Reddit](https://cheatsheets.zip/reddit.html): A visual cheat-sheet for the 17 keyboard shortcuts found on Reddit.com - [Slack](https://cheatsheets.zip/slack.html): A visual cheat-sheet for the 62 keyboard shortcuts found in Slack - [SoundCloud](https://cheatsheets.zip/soundcloud.html): A visual cheat-sheet for the 22 keyboard shortcuts found on SoundCloud - [Twitter](https://cheatsheets.zip/twitter.html): A visual cheat-sheet for the 26 keyboard shortcuts found on Twitter - [Android Studio](https://cheatsheets.zip/android-studio.html): A visual cheat-sheet for the 130 keyboard shortcuts found in the Andriod Studio software - [Github](https://cheatsheets.zip/github.html): A visual cheat-sheet for the 80 keyboard shortcuts found on Github.com - [Shopify](https://cheatsheets.zip/shopify.html): A visual cheat-sheet for the 50 keyboard shortcuts found on the Shopify website - [Zoom](https://cheatsheets.zip/zoom.html): A visual cheat-sheet for the 32 keyboard shortcuts found in Zoom. These shortcuts are for MacOS, for Windows visit /zoom-windows. - [Adobe XD](https://cheatsheets.zip/adobe-xd.html): A visual cheat-sheet for the 97 keyboard shortcuts found in Adobe XD - [Firefox](https://cheatsheets.zip/firefox.html): A visual cheat-sheet for the 116 keyboard shortcuts found in Firefox - [PhpStorm](https://cheatsheets.zip/phpstorm.html): A visual cheat-sheet for the 96 keyboard shortcuts found in JetBrains PhpStorm - [Postman](https://cheatsheets.zip/postman.html): A visual cheat-sheet for the 23 keyboard shortcuts found in Postman - [Webflow](https://cheatsheets.zip/webflow.html): A visual cheat-sheet for the 41 keyboard shortcuts found in Webflow - [Adobe Lightroom CC](https://cheatsheets.zip/adobe-lightroom.html): A visual cheat-sheet for the 251 keyboard shortcuts found in Adobe Lightroom CC - [1Password](https://cheatsheets.zip/1password.html): A cheat sheet for 1password's keyboard shortcuts in Mac, Windows, iOS, Linux. - [Affinity Designer](https://cheatsheets.zip/affinity-designer.html): A visual cheat-sheet for the 108 keyboard shortcuts found in Affinity Designer - [Pocket](https://cheatsheets.zip/pocket.html): A visual cheat-sheet for the 36 keyboard shortcuts found on Pocket for Web - [Trello](https://cheatsheets.zip/trello.html): A visual cheat-sheet for the 29 keyboard shortcuts found on Trello - [Audacity](https://cheatsheets.zip/audacity.html): A visual cheat-sheet for the 135 default keyboard shortcuts found in Audacity - [Framer X](https://cheatsheets.zip/framer-x.html): A visual cheat-sheet for the 45 keyboard shortcuts found in Framer X. This application is MacOS-only. - [Google Drive](https://cheatsheets.zip/google-drive.html): A visual cheat-sheet for the 54 keyboard shortcuts found in Google Drive on the web - [PuTTy](https://cheatsheets.zip/putty.html): A visual cheat-sheet for the 32 keyboard shortcuts found on the PuTTy app - [Sequel Pro](https://cheatsheets.zip/sequel-pro.html): A visual cheat-sheet for the 71 keyboard shortcuts found in Sequel Pro. This application is MacOS-only. - [Apple Music](https://cheatsheets.zip/apple-music.html): A visual cheat-sheet for the 62 keyboard shortcuts found in the Apple Music app. This application is MacOS-only. - [Blender](https://cheatsheets.zip/blender.html): A visual cheat-sheet for the 187 keyboard shortcuts found in Blender - [Obsidian](https://cheatsheets.zip/obsidian.html): A visual cheat-sheet for the 17 keyboard shortcuts found in the Obsidian knowledge base app. - [Telegram Desktop](https://cheatsheets.zip/telegram.html): A visual cheat-sheet for the 37 keyboard shortcuts found on the Telegram Desktop app - [YouTube](https://cheatsheets.zip/youtube.html): A visual cheat-sheet for the 18 keyboard shortcuts found on YouTube.com - [Airtable](https://cheatsheets.zip/airtable.html): A visual cheat-sheet for the 36 keyboard shortcuts found in Airtable - [Bitbucket](https://cheatsheets.zip/bitbucket.html): A visual cheat-sheet for the 35 keyboard shortcuts found on Bitbucket - [Fortnite](https://cheatsheets.zip/fortnite.html): A visual cheat-sheet for the 26 default keyboard shortcuts found in Fortnite - [Gmail](https://cheatsheets.zip/gmail.html): A visual cheat-sheet for the 90 keyboard shortcuts found on Gmail - [Sketch](https://cheatsheets.zip/sketch.html): A visual cheat-sheet for the 149 keyboard shortcuts found in Sketch. This application is MacOS-only. - [Spotify](https://cheatsheets.zip/spotify.html): A visual cheat-sheet for the 23 keyboard shortcuts found in Spotify - [Brave Browser](https://cheatsheets.zip/brave.html): A visual cheat-sheet for the 64 keyboard shortcuts found in the Brave browser - [KanbanMail](https://cheatsheets.zip/kanbanmail.html): A visual cheat-sheet for the 29 keyboard shortcuts found in KanbanMail - [Microsoft Outlook](https://cheatsheets.zip/outlook.html): A visual cheat-sheet for the 210 keyboard shortcuts found in Microsoft Outlook - [Principle](https://cheatsheets.zip/principle.html): A visual cheat-sheet for the 30 keyboard shortcuts found in Principle. This application is MacOS-only. - [Skype](https://cheatsheets.zip/skype.html): A visual cheat-sheet for the 31 keyboard shortcuts found in Skype - [Arduino IDE](https://cheatsheets.zip/arduino.html): A visual cheat-sheet for the 12 keyboard shortcuts found in the Arduino IDE - [Asana](https://cheatsheets.zip/asana.html): A visual cheat-sheet for the 40 keyboard shortcuts found in Asana - [Code Editor for iOS](https://cheatsheets.zip/code-editor-ios.html): A visual cheat-sheet for the 43 keyboard shortcuts found in the Code Editor for iOS app. This application is MacOS-only. - [Jira](https://cheatsheets.zip/jira.html): A visual cheat-sheet for the 44 keyboard shortcuts found in Jira - [Quip.com](https://cheatsheets.zip/quip.html): A visual cheat-sheet for the 52 keyboard shortcuts found in Quip - [WordPress](https://cheatsheets.zip/wordpress.html): A visual cheat-sheet for the 34 keyboard shortcuts found in the WordPress visual editor - [Chrome Developer Tools](https://cheatsheets.zip/chrome-devtools.html): A visual cheat-sheet for the 56 keyboard shortcuts found in Chrome's Developer Tools - [GIMP](https://cheatsheets.zip/gimp.html): A visual cheat-sheet for the 97 keyboard shortcuts found in GIMP - [Google Chrome](https://cheatsheets.zip/google-chrome.html): A visual cheat-sheet for the 65 keyboard shortcuts found in Google Chrome - [Todoist](https://cheatsheets.zip/todoist.html): A visual cheat-sheet for the 37 keyboard shortcuts found in Todoist - [TickTick](https://cheatsheets.zip/ticktick.html): A visual cheat-sheet for the 25 keyboard shortcuts found in the TickTick desktop app - [VLC Player](https://cheatsheets.zip/vlc.html): A visual cheat-sheet for the 82 keyboard shortcuts found in VLC Player - [Missive](https://cheatsheets.zip/missive.html): A visual cheat-sheet for the 83 keyboard shortcuts found in Missive - [Origami Studio](https://cheatsheets.zip/origami.html): A visual cheat-sheet for the 71 keyboard shortcuts found in Origami Studio. This application is MacOS-only. - [Sublime Text](https://cheatsheets.zip/sublime-text.html): A visual cheat-sheet for the 49 keyboard shortcuts found in Sublime Text - [Transmit](https://cheatsheets.zip/transmit.html): A visual cheat-sheet for the 62 keyboard shortcuts found in Transmit. This application is MacOS-only. - [Affinity Photo](https://cheatsheets.zip/affinity-photo.html): A visual cheat-sheet for the 177 keyboard shortcuts found in Affinity Photo - [Monday.com](https://cheatsheets.zip/monday.html): A visual cheat-sheet for the 24 keyboard shortcuts found on Monday.com - [Proto.io](https://cheatsheets.zip/proto-io.html): A visual cheat-sheet for the 48 keyboard shortcuts found in Proto.io - [Superhuman](https://cheatsheets.zip/superhuman.html): A visual cheat-sheet for the 105 keyboard shortcuts found in Superhuman. This application is MacOS-only. - [Vivaldi Browser](https://cheatsheets.zip/vivaldi.html): A visual cheat-sheet for the 69 default keyboard shortcuts found in the Vivaldi browser - [Finder](https://cheatsheets.zip/finder.html): A visual cheat-sheet for the 55 keyboard shortcuts found in Finder. This application is part of MacOS. - [GitLab](https://cheatsheets.zip/gitlab.html): A visual cheat-sheet for the 58 keyboard shortcuts found in GitLab - [Guitar Pro](https://cheatsheets.zip/guitar-pro.html): A visual cheat-sheet for the 129 keyboard shortcuts found in Guitar Pro - [Roam Research](https://cheatsheets.zip/roam.html): A visual cheat-sheet for the 45 keyboard shortcuts found on Roam Research - [SketchUp Pro](https://cheatsheets.zip/sketchup.html): A visual cheat-sheet for the 135 default keyboard shortcuts found in SketchUp Pro - [Unity 3D](https://cheatsheets.zip/unity-3d.html): A visual cheat-sheet for the 50 keyboard shortcuts found in Unity 3D - [IntelliJ IDEA](https://cheatsheets.zip/idea.html): IntelliJ IDEA is a very good Java IDE, most of its commands have shortcuts to keep your hands from leaving the keyboard - [WebStorm](https://cheatsheets.zip/webstorm.html): This quick reference cheat sheet lists the default keyboard shortcuts for WebStorm running on Windows/Linux or Mac
Other - [Google Search](https://cheatsheets.zip/google-search.html): This quick reference cheat sheet lists of Google advanced search operators. - [ASCII Code](https://cheatsheets.zip/ascii-code.html): This cheat sheet is a complete list of ASCII Code Table with their numbers and names. - [Aspect Ratio](https://cheatsheets.zip/aspect-ratio.html): This cheat sheet lists some common aspect ratios and their pixel resolutions. Always confirm your final delivery ratio when shooting. - [HTML Characters Entities](https://cheatsheets.zip/html-char.html): This cheat sheet is a complete list of HTML entities with their numbers and names. Also included is a full list of ASCII characters that can be represented in HTML. - [ISO 639-1 Language Code](https://cheatsheets.zip/iso-639-1.html): This is a list of the ISO language codes that conform to the ISO 639-1 standard, it provide reference for multi-language website. - [Resolutions](https://cheatsheets.zip/resolutions.html): This cheat sheet lists screen sizes, viewport size and CSS media queries for popular Phones, Tablets, Laptops and Watches - [HTTP Status Code](https://cheatsheets.zip/http-status-code.html): The http status codes cheat sheet. a quick reference to every HTTP status code. - [Emoji](https://cheatsheets.zip/emoji.html): Some of the emoji codes are not super easy to remember, so here is a little cheat sheet. - [CheatSheets](https://cheatsheets.zip/quickref.html): This is the magic syntax variant manual that you can use on CheatSheets.zip, It's a good practice for contributors. - [MIME types](https://cheatsheets.zip/mime.html): This cheat sheet lists some common MIME types for the Web. You can look in the [IANA/MIME Media Types registry](http://www.iana.org/assignments/media-types/index.html) which contains all registered MIME types.

🗂️ Directory structure

.
├── source
│   ├── _posts   # Cheat sheet source files
│   │   ├── awk.md
│   │   ├── vim.md # => https://cheatsheets.zip/vim
│   │   ├── php.md
│   │   ├── css.md # => https://cheatsheets.zip/css
│   │   ├── ...
│   └── widget   # Widget files
│       └── chmod.html
├── public       # Distribution files
├── _config.yml
├── gulpfile.js
├── package.json
├── postcss.config.js
├── tailwind.config.js
└── themes
    └── coo      # Theme files

🤝 Contributing

We would like to extend our gratitude to you for considering a contribution to Reference. Your support is what makes CheatSheets.zip a truly amazing resource. Please feel free to submit issues and enhancement requests.

For consistency, we encourage you to refer to the https://cheatsheets.zip/quickref when creating or editing cheat sheets. To get started with development, follow these steps:

  1. Clone Github repo git clone https://github.com/Fechin/reference.git
  2. Install npm package manager (Read installation guide)
  3. Run npm install in the root folder to install dependencies.
  4. Run npm run dev to start a dev server. This serves the project and live reloads when any files are changed, then visit http://127.0.0.1:4000 preview.
  5. Submit a pull request and wait for it to be reviewed and merged.

To create or edit a cheat sheet, you’ll need to create or edit a markdown file in source/_posts/{filename}.md. The file should include a front matter section with the following format:

---
title: CheatSheets
date: 2020-11-25 18:28:43
icon: icon-style
background: bg-emerald-600
tags:
categories:
- Other
  intro: This is a reference of styles that you can use on quickref cheat sheets!
---

Only the title and intro fields are required, and the other options can be left blank.

🐦 Follow us on Twitter

Follow us on Twitter

Stay up-to-date with our project by following us on Twitter! Get all the latest news and updates right in your feed. It’s the perfect way to stay in the loop.

📃 License

The project is licensed under the MIT License and is maintained by Fechin.