Learn Command Line | Flashcards for Developers
Learn Command Line - a text interface for your computer. It’s a program that takes in commands, which it passes on to the computer’s operating system to run.
## Topics
### Algorithms
- [Recursion](https://flashcards.io/app/?url=https://www.codecademy.com/learn/fscj-22-algorithms/modules/wdcp-22-recursion-d930f071-374e-444b-b8d1-f6229c2c3735/cheatsheet)
- [Asymptotic Notation](https://flashcards.io/app/?url=https://www.codecademy.com/learn/fscj-22-algorithms/modules/wdcp-22-asymptotic-notation-955d9102-9539-4c54-a9ba-855b94dc9a17/cheatsheet)
- [Bubble Sort](https://flashcards.io/app/?url=https://www.codecademy.com/learn/fscj-22-algorithms/modules/wdcp-22-bubble-sort-d5360ece-398e-41ba-9747-92907fee92e0/cheatsheet)
- [Merge Sort](https://flashcards.io/app/?url=https://www.codecademy.com/learn/fscj-22-algorithms/modules/wdcp-22-merge-sort-8c032673-eb72-45a9-9ec9-99db73aa5f8d/cheatsheet)
- [Quicksort](https://flashcards.io/app/?url=https://www.codecademy.com/learn/fscj-22-algorithms/modules/wdcp-22-quicksort-36491b24-c957-4536-9d1e-5651678a0d19/cheatsheet)
### AWS FAQs
- [CloudFront](https://flashcards.io/app/?url=https://aws.amazon.com/cloudfront/faqs/)
- [DynamoDB](https://flashcards.io/app/?url=https://aws.amazon.com/dynamodb/faqs/)
- [EC2](https://flashcards.io/app/?url=https://aws.amazon.com/ec2/faqs/)
- [Lambda](https://flashcards.io/app/?url=https://aws.amazon.com/lambda/faqs/)
- [RDS](https://flashcards.io/app/?url=https://aws.amazon.com/rds/faqs/)
- [Redshift](https://flashcards.io/app/?url=https://aws.amazon.com/redshift/faqs/)
- [SageMaker](https://flashcards.io/app/?url=https://aws.amazon.com/sagemaker/faqs/)
- [S3](https://flashcards.io/app/?url=https://aws.amazon.com/s3/faqs/)
### [Bash Shortcuts](https://flashcards.io/app/?url=https://kapeli.com/cheat_sheets/Bash_Shortcuts.docset/Contents/Resources/Documents/index)
### Command Line
- [Navigating the File System](https://flashcards.io/app/?url=https://www.codecademy.com/learn/seds-learn-the-command-line/modules/seds-learn-the-command-line-navigation/cheatsheet)
- [Viewing and Changing the File System](https://flashcards.io/app/?url=https://www.codecademy.com/learn/seds-learn-the-command-line/modules/seds-learn-the-command-line-manipulation/cheatsheet)
- [Redirecting Input and Output](https://flashcards.io/app/?url=https://www.codecademy.com/learn/seds-learn-the-command-line/modules/seds-learn-the-command-line-redirection/cheatsheet)
- [Configuring the Environment](https://flashcards.io/app/?url=https://www.codecademy.com/learn/seds-learn-the-command-line/modules/seds-learn-the-command-line-environment/cheatsheet)
### CSS
- [Syntax and Selectors](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-css/modules/syntax-and-selectors/cheatsheet)
- [Visual Rules](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-css/modules/learn-css-selectors-visual-rules/cheatsheet)
- [The Box Model](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-css/modules/learn-css-box-model/cheatsheet)
- [Display and Positioning](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-css/modules/learn-css-display-positioning/cheatsheet)
- [Colors](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-css/modules/learn-css-colors/cheatsheet)
- [Typography](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-css/modules/learn-css-typography/cheatsheet)
- [Layout with Flexbox](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-intermediate-css/modules/layout-with-flexbox/cheatsheet)
- [Grid](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-intermediate-css/modules/learn-css-grid/cheatsheet)
- [CSS - Transitions](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-intermediate-css/modules/css-transitions/cheatsheet)
- [Learn Responsive Design](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-intermediate-css/modules/learn-responsive-design-module/cheatsheet)
### [Dockerfile](https://flashcards.io/app/?url=https://kapeli.com/cheat_sheets/Dockerfile.docset/Contents/Resources/Documents/index)
### [Git](https://flashcards.io/app/?url=https://kapeli.com/cheat_sheets/Git.docset/Contents/Resources/Documents/index)
### HTML
- [Elements and Structure](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-html/modules/learn-html-elements/cheatsheet)
- [Tables](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-html/modules/learn-html-tables/cheatsheet)
- [Forms](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-html/modules/learn-html-forms/cheatsheet)
- [Semantic HTML](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-html/modules/learn-semantic-html/cheatsheet)
### [HTTP Status Codes](https://flashcards.io/app/?url=https://kapeli.com/cheat_sheets/HTTP_Status_Codes.docset/Contents/Resources/Documents/index)
### Node.js
- [Introduction to Node.js](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-node-js/modules/intro-to-node-js/cheatsheet)
- [Node.js Essentials](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-node-js/modules/node-js-essentials/cheatsheet)
- [Setting up a Server with HTTP](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-node-js/modules/setting-up-a-server-with-http/cheatsheet)
### Python
- [Basics](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-hello-world/cheatsheet)
- [Control Flow](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-control-flow/cheatsheet)
- [Control Flows Extended](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/cspath-code-challenges/cheatsheet)
- [Lists](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-lists/cheatsheet)
- [Loops](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-loops/cheatsheet)
- [Functions](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-functions/cheatsheet)
- [Strings](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-strings/cheatsheet)
- [Modules](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-modules/cheatsheet)
- [Dictionaries](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-dictionaries/cheatsheet)
- [Files](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-files/cheatsheet)
- [Classes](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-python-3/modules/learn-python3-classes/cheatsheet)
- [Function Arguments](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-intermediate-python-3/modules/int-python-function-arguments/cheatsheet)
- [Logging](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-advanced-python/modules/logging/cheatsheet)
- [Functional Programming](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-advanced-python/modules/functional-programming/cheatsheet)
- [Database Operations](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-advanced-python/modules/functional-programming/cheatsheet)
- [Concurrent Programming](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-advanced-python/modules/concurrent-programming/cheatsheet)
### React
- [React Terminology](https://flashcards.io/app/?url=https://legacy.reactjs.org/docs/glossary.html)
- [Redux Terminology](https://flashcards.io/app/?url=https://redux.js.org/understanding/thinking-in-redux/glossary)
- [JSX](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-introduction/modules/react-101-jsx-u/cheatsheet)
- [React Components](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-introduction/modules/learn-react-components/cheatsheet)
- [Components Interacting](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-introduction/modules/react-components-interacting/cheatsheet)
- [Components and Props](https://flashcards.io/app/?url=https://www.codecademy.com/learn/fscp-react-part-ii/modules/fecp-components-and-props/cheatsheet)
- [React Programming Patterns](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-state-management/modules/learn-react-stateless-inherit-stateful/cheatsheet)
- [Hooks](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-hooks/modules/learn-react-hooks/cheatsheet)
- [Lifecycle Methods](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-lifecycle-methods/modules/learn-react-lifecycle-methods/cheatsheet)
- [React Styles](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-react-additional-basics/modules/react-styles/cheatsheet)
- [Advanced React: Custom Hooks](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-advanced-react/modules/advanced-react-custom-hooks/cheatsheet)
- [Advanced React: Context](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-advanced-react/modules/advanced-react-context/cheatsheet)
### Ruby
- [Introduction to Ruby](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-introduction-to-ruby-u/cheatsheet)
- [Control Flow in Ruby](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-control-flow-in-ruby-u/cheatsheet)
- [Looping with Ruby](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-looping-with-ruby-u/cheatsheet)
- [Arrays and Hashes](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-arrays-and-hashes-u/cheatsheet)
- [Blocks and Sorting](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-blocks-and-sorting-u/cheatsheet)
- [Hashes and Symbols](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-hashes-and-symbols-u/cheatsheet)
- [Refactoring](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-refactoring-u/cheatsheet)
- [Blocks, Procs, and Lambdas](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-blocks-procs-and-lambdas-u/cheatsheet)
- [Object-Oriented Programming, Part I](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-object-oriented-programming-part-i-u/cheatsheet)
- [Object-Oriented Programming, Part II](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-object-oriented-programming-part-ii-u/cheatsheet)
### SQL
- [Manipulation](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-sql/modules/learn-sql-manipulation/cheatsheet)
- [Queries](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-sql/modules/learn-sql-queries/cheatsheet)
- [Aggregate Functions](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-sql/modules/learn-sql-aggregate-functions/cheatsheet)
- [Multiple Tables](https://flashcards.io/app/?url=https://www.codecademy.com/learn/learn-sql/modules/learn-sql-multiple-tables/cheatsheet)
- [SQLite](https://flashcards.io/app/?url=https://kapeli.com/cheat_sheets/SQLite.docset/Contents/Resources/Documents/index)
- [YAML](https://flashcards.io/app/?url=https://kapeli.com/cheat_sheets/YAML.docset/Contents/Resources/Documents/index)
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If you've noticed a mistake or have a new deck, [open a pull request](https://github.com/flashcards/flashcards.github.io/issues/new) or start a [discussion](https://github.com/flashcards/flashcards.github.io/discussions/categories/new-topic-requests)!
### Steps to contributing to this GitBook:
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7. Commit your changes and [open a PR](https://github.com/flashcards/flashcards.github.io/issues/new).
---
Created by [Zachary Lawson](https://zacharylawson.com/)
================================================
FILE: SUMMARY.md
================================================
# Table of contents
- [Introduction](README.md)
## flashcards.github.io
- [Command Line](command_line/README.md)
- [Introduction Flashcards](command_line/introduction.md)
- [GraphQL](graphql/README.md)
- [Introduction Flashcards](graphql/introduction.md)
- [SQL](sql/README.md)
- [Introduction Flashcards](sql/introduction.md)
================================================
FILE: book.json
================================================
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================================================
FILE: command_line/README.md
================================================
# Learn Command Line | Flashcards for Developers
Learn Command Line - a text interface for your computer. It’s a program that takes in commands, which it passes on to the computer’s operating system to run.
### Decks
- [Introduction](introduction.md)
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FILE: command_line/index.html
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The command line is a text interface for your computer. It’s a program that takes in commands, which it passes on to the computer’s operating system to run.
pwd prints the name of the working directory
cd takes a directory name as an argument, and switches into that directory
ls lists all files and directories in the working directory
cp copies files or directories. cp file1 file2 will copy file1 to file2
To move up one directory, use cd ..
mkdir takes in a directory name as an argument, and then creates a new directory in the current working directory.
To move a file into a directory, use mv with the source file as the first argument and the destination directory as the second argument
cat allows us to create single or multiple files, view contain of file, concatenate files and redirect output in terminal or files.
touch creates a new file inside the working directory. It takes in a file name as an argument, and then creates a new empty file in the current working directory. Here we used touch to create a new file named keyboard.txt inside the 2014/dec/ directory.
grep stands for “global regular expression print”. It searches files for lines that match a pattern and returns the results. It is case sensitive.
rm deletes files
rm -r removes a directory recursively
man command shows the manual for the specified command
chmod ugo file changes permissions of file to ugo - u is the user's permissions, g is the group's permissions, and o is everyone else's permissions. The values of u, g, and o can be any number between 0 and 7.
cat command allows us to create single or multiple files, view contain of file, concatenate files and redirect output in terminal or files.
>> takes the standard output of the command on the left and appends (adds) it to the file on the right. Example: cat glaciers.txt >> rivers.txt
< takes the standard input from the file on the right and inputs it into the program on the left. Example: cat < lakes.txt
| is a “pipe”. The | takes the standard output of the command on the left, and pipes it as standard input to the command on the right. You can think of this as “command to command” redirection. Example: cat volcanoes.txt | wc
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gitbook.events.on('page.change', function() {
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================================================
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window.open('http://www.facebook.com/sharer/sharer.php?s=100&p[url]='+encodeURIComponent(location.href));
}
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'twitter': {
'label': 'Twitter',
'icon': 'fa fa-twitter',
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e.preventDefault();
window.open('http://twitter.com/home?status='+encodeURIComponent(document.title+' '+location.href));
}
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'google': {
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'onClick': function(e) {
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window.open('https://plus.google.com/share?url='+encodeURIComponent(location.href));
}
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'weibo': {
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'icon': 'fa fa-weibo',
'onClick': function(e) {
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window.open('http://service.weibo.com/share/share.php?content=utf-8&url='+encodeURIComponent(location.href)+'&title='+encodeURIComponent(document.title));
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gitbook.toolbar.createButton({
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================================================
FILE: gitbook/gitbook.js
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!function e(t,n,r){function o(s,a){if(!n[s]){if(!t[s]){var u="function"==typeof require&&require;if(!a&&u)return u(s,!0);if(i)return i(s,!0);var l=new Error("Cannot find module '"+s+"'");throw l.code="MODULE_NOT_FOUND",l}var c=n[s]={exports:{}};t[s][0].call(c.exports,function(e){var n=t[s][1][e];return o(n?n:e)},c,c.exports,e,t,n,r)}return n[s].exports}for(var i="function"==typeof require&&require,s=0;s Learn GraphQL - At its simplest, GraphQL is about asking for specific fields on objects. A GraphQL service is created by defining types and fields on those types, then providing functions for each field on each type. GraphQL is a query language for your API, and a server-side runtime for executing queries by using a type system you define for your data.","
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