90 skills found · Page 2 of 3
meSingh / Git.wtf💩 :interrobang: Find solutions to all your git problems along with tips & tricks to improve your git workflows!
ledovsky / Effective GitGit Tips and Ticks for Effective Developers
groda / The Ultimate Gitignore Guide.gitignore Tutorial — Everything you never knew you needed to know about .gitignore! This beginner-friendly guide offers practical tips to keep your Git repos clean and your workflow efficient, with clear examples to help you master the basics and best practices of managing ignored files.
shinbatsu / Git TipsSome useful info about working with git
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Previous</span></a> <a class="w3-btn" href="default.asp"><span class="w3-hide-small">Complete HTML </span>Reference</a> <a class="w3-right w3-btn" href="tag_param.asp"><span class="w3-hide-small">Next </span>❯</a> </div> <br> <div class="w3-example"> <h3>Example</h3> <p>A paragraph is marked up as follows:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>p<span class="tagcolor" style="color:mediumblue">></span></span>This is some text in a paragraph.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/p<span class="tagcolor" style="color:mediumblue">></span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_paragraphs1" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <p>More "Try it Yourself" examples below.</p> <hr> <h2>Definition and Usage</h2> <p>The <code class="w3-codespan"><p></code> tag defines a paragraph.</p> <p>Browsers automatically add a single blank line before and after each <code class="w3-codespan"><p></code> element.</p> <p><strong>Tip:</strong> Use CSS to <a href="/html/html_css.asp">style paragraphs</a>.</p> <hr> <h2>Browser Support</h2> <table class="browserref notranslate"> <tbody><tr> <th style="width:20%;font-size:16px;text-align:left;">Element</th> <th style="width:16%;" class="bsChrome" title="Chrome"></th> <th style="width:16%;" class="bsEdge" title="Internet Explorer / Edge"></th> <th style="width:16%;" class="bsFirefox" title="Firefox"></th> <th style="width:16%;" class="bsSafari" title="Safari"></th> <th style="width:16%;" class="bsOpera" title="Opera"></th> </tr><tr> <td style="text-align:left;"><p></td> <td>Yes</td> <td>Yes</td> <td>Yes</td> <td>Yes</td> <td>Yes</td> </tr> </tbody></table> <hr> <h2>Global Attributes</h2> <p>The <code class="w3-codespan"><p></code> tag also supports the <a href="ref_standardattributes.asp">Global Attributes in HTML</a>.</p> <hr> <h2>Event Attributes</h2> <p>The <code class="w3-codespan"><p></code> tag also supports the <a href="ref_eventattributes.asp">Event Attributes in HTML</a>.</p> <hr> <div id="midcontentadcontainer" style="overflow:auto;text-align:center"> <!-- MidContent --> <!-- <p class="adtext">Advertisement</p> --> <div id="adngin-mid_content-0" data-google-query-id="CKfs_8ueqvcCFXiOSwUd2fYBLg"><div id="sn_ad_label_adngin-mid_content-0" class="sn_ad_label" style="color:#000000;font-size:12px;margin:0;text-align:center;">ADVERTISEMENT</div><div id="google_ads_iframe_/22152718,16833175/sws-hb//w3schools.com//mid_content_1__container__" style="border: 0pt none; display: inline-block; width: 300px; height: 250px;"><iframe frameborder="0" src="https://56d0da6c34aaa471db22bb4266aac656.safeframe.googlesyndication.com/safeframe/1-0-38/html/container.html" id="google_ads_iframe_/22152718,16833175/sws-hb//w3schools.com//mid_content_1" title="3rd party ad content" name="" scrolling="no" marginwidth="0" marginheight="0" width="300" height="250" data-is-safeframe="true" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" role="region" aria-label="Advertisement" tabindex="0" data-google-container-id="8" style="border: 0px; vertical-align: bottom;" data-load-complete="true"></iframe></div></div> </div> <hr> <h2>More Examples</h2> <div class="w3-example"> <h3>Example</h3> <p>Align text in a paragraph (with CSS):</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>p<span class="attributecolor" style="color:red"> style<span class="attributevaluecolor" style="color:mediumblue">="text-align:right"</span></span><span class="tagcolor" style="color:mediumblue">></span></span>This is some text in a paragraph.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/p<span class="tagcolor" style="color:mediumblue">></span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_p_align_css" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <div class="w3-example"> <h3>Example</h3> <p>Style paragraphs with CSS:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>html<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>head<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>style<span class="tagcolor" style="color:mediumblue">></span></span><span class="cssselectorcolor" style="color:brown"><br>p <span class="cssdelimitercolor" style="color:black">{</span><span class="csspropertycolor" style="color:red"><br> color<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> navy<span class="cssdelimitercolor" style="color:black">;</span></span><br> text-indent<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 30px<span class="cssdelimitercolor" style="color:black">;</span></span><br> text-transform<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> uppercase<span class="cssdelimitercolor" style="color:black">;</span></span><br></span><span class="cssdelimitercolor" style="color:black">}</span><br></span><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/style<span class="tagcolor" style="color:mediumblue">></span></span><br> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/head<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>body<span class="tagcolor" style="color:mediumblue">></span></span><br><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>p<span class="tagcolor" style="color:mediumblue">></span></span>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/p<span class="tagcolor" style="color:mediumblue">></span></span><br><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/body<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/html<span class="tagcolor" style="color:mediumblue">></span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_p_style_css" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <div class="w3-example"> <h3>Example</h3> <p> More on paragraphs:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>p<span class="tagcolor" style="color:mediumblue">></span></span><br>This paragraph<br>contains a lot of lines<br>in the source code,<br> but the browser <br>ignores it.<br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/p<span class="tagcolor" style="color:mediumblue">></span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_paragraphs2" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <div class="w3-example"> <h3>Example</h3> <p>Poem problems in HTML:</p> <div class="w3-code notranslate htmlHigh"> <span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>p<span class="tagcolor" style="color:mediumblue">></span></span><br>My Bonnie lies over the ocean.<br>My Bonnie lies over the sea.<br>My Bonnie lies over the ocean.<br>Oh, bring back my Bonnie to me.<br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/p<span class="tagcolor" style="color:mediumblue">></span></span> </div> <a target="_blank" href="tryit.asp?filename=tryhtml_poem" class="w3-btn w3-margin-bottom">Try it Yourself »</a> </div> <hr> <h2>Related Pages</h2> <p>HTML tutorial: <a href="/html/html_paragraphs.asp">HTML Paragraphs</a></p> <p>HTML DOM reference: <a href="/jsref/dom_obj_paragraph.asp">Paragraph Object</a></p> <hr> <h2>Default CSS Settings</h2> <p>Most browsers will display the <code class="w3-codespan"><p></code> element with the following default values:</p> <div class="w3-example"> <h3>Example</h3> <div class="w3-code notranslate cssHigh"><span class="cssselectorcolor" style="color:brown"> p <span class="cssdelimitercolor" style="color:black">{</span><span class="csspropertycolor" style="color:red"><br> display<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> block<span class="cssdelimitercolor" style="color:black">;</span></span><br> margin-top<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 1em<span class="cssdelimitercolor" style="color:black">;</span></span><br> margin-bottom<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 1em<span class="cssdelimitercolor" style="color:black">;</span></span><br> margin-left<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 0<span class="cssdelimitercolor" style="color:black">;</span></span><br> margin-right<span class="csspropertyvaluecolor" style="color:mediumblue"><span class="cssdelimitercolor" style="color:black">:</span> 0<span class="cssdelimitercolor" style="color:black">;</span></span><br></span><span class="cssdelimitercolor" style="color:black">}</span> </span></div> <a target="_blank" href="tryit.asp?filename=tryhtml_p_default_css" class="w3-btn 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FGasper / Perl Github Action TipsTips for testing Perl modules via GitHub Actions
hprobotic / Git TipsNhững lệnh git cơ bản
alexfish / Git TipsSome quick git tips
nima0011 / Nima0011# Contributing to this repository <!-- omit in toc --> ## Getting started <!-- omit in toc --> Before you begin: - This site is powered by Node.js. Check to see if you're on the [version of node we support](contributing/development.md). - Have you read the [code of conduct](CODE_OF_CONDUCT.md)? - Check out the [existing issues](https://github.com/github/docs/issues) & see if we [accept contributions](#types-of-contributions-memo) for your type of issue. ### Use the 'make a contribution' button  Navigating a new codebase can be challenging, so we're making that a little easier. As you're using docs.github.com, you may come across an article that you want to make an update to. You can click on the **make a contribution** button right on that article, which will take you to the file in this repo where you'll make your changes. Before you make your changes, check to see if an [issue exists](https://github.com/github/docs/issues/) already for the change you want to make. ### Don't see your issue? Open one If you spot something new, open an issue using a [template](https://github.com/github/docs/issues/new/choose). We'll use the issue to have a conversation about the problem you want to fix. ### Ready to make a change? Fork the repo Fork using GitHub Desktop: - [Getting started with GitHub Desktop](https://docs.github.com/en/desktop/installing-and-configuring-github-desktop/getting-started-with-github-desktop) will guide you through setting up Desktop. - Once Desktop is set up, you can use it to [fork the repo](https://docs.github.com/en/desktop/contributing-and-collaborating-using-github-desktop/cloning-and-forking-repositories-from-github-desktop)! Fork using the command line: - [Fork the repo](https://docs.github.com/en/github/getting-started-with-github/fork-a-repo#fork-an-example-repository) so that you can make your changes without affecting the original project until you're ready to merge them. Fork with [GitHub Codespaces](https://github.com/features/codespaces): - [Fork, edit, and preview](https://docs.github.com/en/free-pro-team@latest/github/developing-online-with-codespaces/creating-a-codespace) using [GitHub Codespaces](https://github.com/features/codespaces) without having to install and run the project locally. ### Make your update: Make your changes to the file(s) you'd like to update. Here are some tips and tricks for [using the docs codebase](#working-in-the-githubdocs-repository). - Are you making changes to the application code? You'll need **Node.js v14** to run the site locally. See [contributing/development.md](contributing/development.md). - Are you contributing to markdown? We use [GitHub Markdown](contributing/content-markup-reference.md). ### Open a pull request When you're done making changes and you'd like to propose them for review, use the [pull request template](#pull-request-template) to open your PR (pull request). ### Submit your PR & get it reviewed - Once you submit your PR, others from the Docs community will review it with you. The first thing you're going to want to do is a [self review](#self-review). - After that, we may have questions, check back on your PR to keep up with the conversation. - Did you have an issue, like a merge conflict? Check out our [git tutorial](https://lab.github.com/githubtraining/managing-merge-conflicts) on how to resolve merge conflicts and other issues. ### Your PR is merged! Congratulations! The whole GitHub community thanks you. :sparkles: Once your PR is merged, you will be proudly listed as a contributor in the [contributor chart](https://github.com/github/docs/graphs/contributors). ### Keep contributing as you use GitHub Docs Now that you're a part of the GitHub Docs community, you can keep participating in many ways. **Learn more about contributing:** - [Types of contributions :memo:](#types-of-contributions-memo) - [:mega: Discussions](#mega-discussions) - [:beetle: Issues](#beetle-issues) - [:hammer_and_wrench: Pull requests](#hammer_and_wrench-pull-requests) - [:question: Support](#question-support) - [:earth_asia: Translations](#earth_asia-translations) - [:balance_scale: Site Policy](#balance_scale-site-policy) - [Starting with an issue](#starting-with-an-issue) - [Labels](#labels) - [Opening a pull request](#opening-a-pull-request) - [Working in the github/docs repository](#working-in-the-githubdocs-repository) - [Reviewing](#reviewing) - [Self review](#self-review) - [Pull request template](#pull-request-template) - [Suggested changes](#suggested-changes) - [Windows](#windows) ## Types of contributions :memo: You can contribute to the GitHub Docs content and site in several ways. This repo is a place to discuss and collaborate on docs.github.com! Our small, but mighty :muscle: docs team is maintaining this repo, to preserve our bandwidth, off topic conversations will be closed. ### :mega: Discussions Discussions are where we have conversations. If you'd like help troubleshooting a docs PR you're working on, have a great new idea, or want to share something amazing you've learned in our docs, join us in [discussions](https://github.com/github/docs/discussions). ### :beetle: Issues [Issues](https://docs.github.com/en/github/managing-your-work-on-github/about-issues) are used to track tasks that contributors can help with. If an issue has a triage label, we haven't reviewed it yet and you shouldn't begin work on it. If you've found something in the content or the website that should be updated, search open issues to see if someone else has reported the same thing. If it's something new, open an issue using a [template](https://github.com/github/docs/issues/new/choose). We'll use the issue to have a conversation about the problem you want to fix. ### :hammer_and_wrench: Pull requests A [pull request](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests) is a way to suggest changes in our repository. When we merge those changes, they should be deployed to the live site within 24 hours. :earth_africa: To learn more about opening a pull request in this repo, see [Opening a pull request](#opening-a-pull-request) below. ### :question: Support We are a small team working hard to keep up with the documentation demands of a continuously changing product. Unfortunately, we just can't help with support questions in this repository. If you are experiencing a problem with GitHub, unrelated to our documentation, please [contact GitHub Support directly](https://support.github.com/contact). Any issues, discussions, or pull requests opened here requesting support will be given information about how to contact GitHub Support, then closed and locked. If you're having trouble with your GitHub account, contact [Support](https://support.github.com/contact). ### :earth_asia: Translations This website is internationalized and available in multiple languages. The source content in this repository is written in English. We integrate with an external localization platform called [Crowdin](https://crowdin.com) and work with professional translators to localize the English content. **We do not currently accept contributions for translated content**, but we hope to in the future. ### :balance_scale: Site Policy GitHub's site policies are published on docs.github.com, too! If you find a typo in the site policy section, you can open a pull request to fix it. For anything else, see [the CONTRIBUTING guide in the site-policy repo](https://github.com/github/site-policy/blob/main/CONTRIBUTING.md). ## Starting with an issue You can browse existing issues to find something that needs help! ### Labels Labels can help you find an issue you'd like to help with. - The [`help wanted` label](https://github.com/github/docs/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22) is for problems or updates that anyone in the community can start working on. - The [`good first issue` label](https://github.com/github/docs/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22) is for problems or updates we think are ideal for beginners. - The [`content` label](https://github.com/github/docs/issues?q=is%3Aopen+is%3Aissue+label%3Acontent) is for problems or updates in the content on docs.github.com. These will usually require some knowledge of Markdown. - The [`engineering` label](https://github.com/github/docs/issues?q=is%3Aopen+is%3Aissue+label%3Aengineering) is for problems or updates in the docs.github.com website. These will usually require some knowledge of JavaScript/Node.js or YAML to fix. ## Opening a pull request You can use the GitHub user interface :pencil2: for some small changes, like fixing a typo or updating a readme. You can also fork the repo and then clone it locally, to view changes and run your tests on your machine. ## Working in the github/docs repository Here's some information that might be helpful while working on a Docs PR: - [Development](/contributing/development.md) - This short guide describes how to get this app running on your local machine. - [Content markup reference](/contributing/content-markup-reference.md) - All of our content is written in GitHub-flavored Markdown, with some additional enhancements. - [Content style guide for GitHub Docs](/contributing/content-style-guide.md) - This guide covers GitHub-specific information about how we style our content and images. It also links to the resources we use for general style guidelines. - [Reusables](/data/reusables/README.md) - We use reusables to help us keep content up to date. Instead of writing the same long string of information in several articles, we create a reusable, then call it from the individual articles. - [Variables](/data/variables/README.md) - We use variables the same way we use reusables. Variables are for short strings of reusable text. - [Liquid](/contributing/liquid-helpers.md) - We use liquid helpers to create different versions of our content. - [Scripts](/script/README.md) - The scripts directory is the home for all of the scripts you can run locally. - [Tests](/tests/README.md) - We use tests to ensure content will render correctly on the site. Tests run automatically in your PR, and sometimes it's also helpful to run them locally. ## Reviewing We (usually the docs team, but sometimes GitHub product managers, engineers, or supportocats too!) review every single PR. The purpose of reviews is to create the best content we can for people who use GitHub. :yellow_heart: Reviews are always respectful, acknowledging that everyone did the best possible job with the knowledge they had at the time. :yellow_heart: Reviews discuss content, not the person who created it. :yellow_heart: Reviews are constructive and start conversation around feedback. ### Self review You should always review your own PR first. For content changes, make sure that you: - [ ] Confirm that the changes address every part of the content design plan from your issue (if there are differences, explain them). - [ ] Review the content for technical accuracy. - [ ] Review the entire pull request using the [localization checklist](contributing/localization-checklist.md). - [ ] Copy-edit the changes for grammar, spelling, and adherence to the style guide. - [ ] Check new or updated Liquid statements to confirm that versioning is correct. - [ ] Check that all of your changes render correctly in staging. Remember, that lists and tables can be tricky. - [ ] If there are any failing checks in your PR, troubleshoot them until they're all passing. ### Pull request template When you open a pull request, you must fill out the "Ready for review" template before we can review your PR. This template helps reviewers understand your changes and the purpose of your pull request. ### Suggested changes We may ask for changes to be made before a PR can be merged, either using [suggested changes](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/incorporating-feedback-in-your-pull-request) or pull request comments. You can apply suggested changes directly through the UI. You can make any other changes in your fork, then commit them to your branch. As you update your PR and apply changes, mark each conversation as [resolved](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/commenting-on-a-pull-request#resolving-conversations). ## Windows This site can be developed on Windows, however a few potential gotchas need to be kept in mind: 1. Regular Expressions: Windows uses `\r\n` for line endings, while Unix based systems use `\n`. Therefore when working on Regular Expressions, use `\r?\n` instead of `\n` in order to support both environments. The Node.js [`os.EOL`](https://nodejs.org/api/os.html#os_os_eol) property can be used to get an OS-specific end-of-line marker. 1. Paths: Windows systems use `\` for the path separator, which would be returned by `path.join` and others. You could use `path.posix`, `path.posix.join` etc and the [slash](https://ghub.io/slash) module, if you need forward slashes - like for constructing URLs - or ensure your code works with either. 1. Bash: Not every Windows developer has a terminal that fully supports Bash, so it's generally preferred to write [scripts](/script) in JavaScript instead of Bash.
subzero987 / Github Dorks TipsThis is GitHub_Dorks and some tips i collect from different resources.Recon_Api is tip when you find token or api without knowing what to do
DevTips / GitHub For Noobs Community TipsThis Repo is a collection of great tips and references from the comments found in the GitHub for Noobs Series — https://www.youtube.com/playlist?list=PLqGj3iMvMa4LFz8DZ0t-89twnelpT4Ilw
LukosiuPro / Ender3 V3 SE Nebula Pad WikiHere you will find all sorts of helpful tips, tricks, how to. This is just the small amount of stuff that I encountered myself and all amazing people, that shared, or I found that it is useful from reddit/discord/git. Feel free to contribute yourself if you see anything that you want to add.
SagarBiswas-MultiHAT / NoteBooks MaintainingBYmeA curated, well-organized collection of Jupyter notebooks and PDF notes covering Bash, C, C++, CyberSecurity, JavaScript, PHP, Python, React, Tools, Git & GitHub and Tips & Tricks. Each notebook includes runnable code cells, step‑by‑step explanations, examples, exercises, and resources for learners and developers to practice and reuse.
vimalgandhi / Docker Commands Help Tips# Docker Commands, Help & Tips ### Show commands & management commands ``` $ docker ``` ### Docker version info ``` $ docker version ``` ### Show info like number of containers, etc ``` $ docker info ``` # WORKING WITH CONTAINERS ### Create an run a container in foreground ``` $ docker container run -it -p 80:80 nginx ``` ### Create an run a container in background ``` $ docker container run -d -p 80:80 nginx ``` ### Shorthand ``` $ docker container run -d -p 80:80 nginx ``` ### Naming Containers ``` $ docker container run -d -p 80:80 --name nginx-server nginx ``` ### TIP: WHAT RUN DID - Looked for image called nginx in image cache - If not found in cache, it looks to the default image repo on Dockerhub - Pulled it down (latest version), stored in the image cache - Started it in a new container - We specified to take port 80- on the host and forward to port 80 on the container - We could do "$ docker container run --publish 8000:80 --detach nginx" to use port 8000 - We can specify versions like "nginx:1.09" ### List running containers ``` $ docker container ls ``` OR ``` $ docker ps ``` ### List all containers (Even if not running) ``` $ docker container ls -a ``` ### Stop container ``` $ docker container stop [ID] ``` ### Stop all running containers ``` $ docker stop $(docker ps -aq) ``` ### Remove container (Can not remove running containers, must stop first) ``` $ docker container rm [ID] ``` ### To remove a running container use force(-f) ``` $ docker container rm -f [ID] ``` ### Remove multiple containers ``` $ docker container rm [ID] [ID] [ID] ``` ### Remove all containers ``` $ docker rm $(docker ps -aq) ``` ### Get logs (Use name or ID) ``` $ docker container logs [NAME] ``` ### List processes running in container ``` $ docker container top [NAME] ``` #### TIP: ABOUT CONTAINERS Docker containers are often compared to virtual machines but they are actually just processes running on your host os. In Windows/Mac, Docker runs in a mini-VM so to see the processes youll need to connect directly to that. On Linux however you can run "ps aux" and see the processes directly # IMAGE COMMANDS ### List the images we have pulled ``` $ docker image ls ``` ### We can also just pull down images ``` $ docker pull [IMAGE] ``` ### Remove image ``` $ docker image rm [IMAGE] ``` ### Remove all images ``` $ docker rmi $(docker images -a -q) ``` #### TIP: ABOUT IMAGES - Images are app bianaries and dependencies with meta data about the image data and how to run the image - Images are no a complete OS. No kernel, kernel modules (drivers) - Host provides the kernel, big difference between VM ### Some sample container creation NGINX: ``` $ docker container run -d -p 80:80 --name nginx nginx (-p 80:80 is optional as it runs on 80 by default) ``` APACHE: ``` $ docker container run -d -p 8080:80 --name apache httpd ``` MONGODB: ``` $ docker container run -d -p 27017:27017 --name mongo mongo ``` MYSQL: ``` $ docker container run -d -p 3306:3306 --name mysql --env MYSQL_ROOT_PASSWORD=123456 mysql ``` ## CONTAINER INFO ### View info on container ``` $ docker container inspect [NAME] ``` ### Specific property (--format) ``` $ docker container inspect --format '{{ .NetworkSettings.IPAddress }}' [NAME] ``` ### Performance stats (cpu, mem, network, disk, etc) ``` $ docker container stats [NAME] ``` ## ACCESSING CONTAINERS ### Create new nginx container and bash into ``` $ docker container run -it --name [NAME] nginx bash ``` - i = interactive Keep STDIN open if not attached - t = tty - Open prompt **For Git Bash, use "winpty"** ``` $ winpty docker container run -it --name [NAME] nginx bash ``` ### Run/Create Ubuntu container ``` $ docker container run -it --name ubuntu ubuntu ``` **(no bash because ubuntu uses bash by default)** ### You can also make it so when you exit the container does not stay by using the -rm flag ``` $ docker container run --rm -it --name [NAME] ubuntu ``` ### Access an already created container, start with -ai ``` $ docker container start -ai ubuntu ``` ### Use exec to edit config, etc ``` $ docker container exec -it mysql bash ``` ### Alpine is a very small Linux distro good for docker ``` $ docker container run -it alpine sh ``` (use sh because it does not include bash) (alpine uses apk for its package manager - can install bash if you want) # NETWORKING ### "bridge" or "docker0" is the default network ### Get port ``` $ docker container port [NAME] ``` ### List networks ``` $ docker network ls ``` ### Inspect network ``` $ docker network inspect [NETWORK_NAME] ("bridge" is default) ``` ### Create network ``` $ docker network create [NETWORK_NAME] ``` ### Create container on network ``` $ docker container run -d --name [NAME] --network [NETWORK_NAME] nginx ``` ### Connect existing container to network ``` $ docker network connect [NETWORK_NAME] [CONTAINER_NAME] ``` ### Disconnect container from network ``` $ docker network disconnect [NETWORK_NAME] [CONTAINER_NAME] ``` ### Detach network from container ``` $ docker network disconnect ``` # IMAGE TAGGING & PUSHING TO DOCKERHUB # tags are labels that point ot an image ID ``` $ docker image ls ``` Youll see that each image has a tag ### Retag existing image ``` $ docker image tag nginx btraversy/nginx ``` ### Upload to dockerhub ``` $ docker image push bradtraversy/nginx ``` ### If denied, do ``` $ docker login ``` ### Add tag to new image ``` $ docker image tag bradtraversy/nginx bradtraversy/nginx:testing ``` ### DOCKERFILE PARTS - FROM - The os used. Common is alpine, debian, ubuntu - ENV - Environment variables - RUN - Run commands/shell scripts, etc - EXPOSE - Ports to expose - CMD - Final command run when you launch a new container from image - WORKDIR - Sets working directory (also could use 'RUN cd /some/path') - COPY # Copies files from host to container ### Build image from dockerfile (reponame can be whatever) ### From the same directory as Dockerfile ``` $ docker image build -t [REPONAME] . ``` #### TIP: CACHE & ORDER - If you re-run the build, it will be quick because everythging is cached. - If you change one line and re-run, that line and everything after will not be cached - Keep things that change the most toward the bottom of the Dockerfile # EXTENDING DOCKERFILE ### Custom Dockerfile for html paqge with nginx ``` FROM nginx:latest # Extends nginx so everything included in that image is included here WORKDIR /usr/share/nginx/html COPY index.html index.html ``` ### Build image from Dockerfile ``` $ docker image build -t nginx-website ``` ### Running it ``` $ docker container run -p 80:80 --rm nginx-website ``` ### Tag and push to Dockerhub ``` $ docker image tag nginx-website:latest btraversy/nginx-website:latest ``` ``` $ docker image push bradtraversy/nginx-website ``` # VOLUMES ### Volume - Makes special location outside of container UFS. Used for databases ### Bind Mount -Link container path to host path ### Check volumes ``` $ docker volume ls ``` ### Cleanup unused volumes ``` $ docker volume prune ``` ### Pull down mysql image to test ``` $ docker pull mysql ``` ### Inspect and see volume ``` $ docker image inspect mysql ``` ### Run container ``` $ docker container run -d --name mysql -e MYSQL_ALLOW_EMPTY_PASSWORD=True mysql ``` ### Inspect and see volume in container ``` $ docker container inspect mysql ``` #### TIP: Mounts - You will also see the volume under mounts - Container gets its own uniqe location on the host to store that data - Source: xxx is where it lives on the host ### Check volumes ``` $ docker volume ls ``` **There is no way to tell volumes apart for instance with 2 mysql containers, so we used named volumes** ### Named volumes (Add -v command)(the name here is mysql-db which could be anything) ``` $ docker container run -d --name mysql -e MYSQL_ALLOW_EMPTY_PASSWORD=True -v mysql-db:/var/lib/mysql mysql ``` ### Inspect new named volume ``` docker volume inspect mysql-db ``` # BIND MOUNTS - Can not use in Dockerfile, specified at run time (uses -v as well) - ... run -v /Users/brad/stuff:/path/container (mac/linux) - ... run -v //c/Users/brad/stuff:/path/container (windows) **TIP: Instead of typing out local path, for working directory use $(pwd):/path/container - On windows may not work unless you are in your users folder** ### Run and be able to edit index.html file (local dir should have the Dockerfile and the index.html) ``` $ docker container run -p 80:80 -v $(pwd):/usr/share/nginx/html nginx ``` ### Go into the container and check ``` $ docker container exec -it nginx bash $ cd /usr/share/nginx/html $ ls -al ``` ### You could create a file in the container and it will exiost on the host as well ``` $ touch test.txt ``` # DOCKER COMPOSE - Configure relationships between containers - Save our docker container run settings in easy to read file - 2 Parts: YAML File (docker.compose.yml) + CLI tool (docker-compose) ### 1. docker.compose.yml - Describes solutions for - containers - networks - volumes ### 2. docker-compose CLI - used for local dev/test automation with YAML files ### Sample compose file (From Bret Fishers course) ``` version: '2' # same as # docker run -p 80:4000 -v $(pwd):/site bretfisher/jekyll-serve services: jekyll: image: bretfisher/jekyll-serve volumes: - .:/site ports: - '80:4000' ``` ### To run ``` docker-compose up ``` ### You can run in background with ``` docker-compose up -d ``` ### To cleanup ``` docker-compose down ```
laurenorsini / GithubtipsTips and tricks for Git
621625 / Bitcoinmeetups.github.comBitcoin Challenges, Meetups and Services, Exchange, Giveaways, Tipping, Ethereum, Counterparty, Dogeparty, ChangeTip, Tokens, Skype Groups, Lists, Projects, Sidechains, Maidsafe, CoinFactory, Git, Open Source, Incubator, Mastercoin, DAC, DAO, Bitshares, BitcoinX, Open-Transactions, Ripple, Bitcoin, Litecoin, Altcoins
mig82 / Visualizer And GitTips and tricks to use Git with Kony Visualizer projects.
idiv-biodiversity / Git Knowledge Basea collection of best practices and useful tips around git
Gothamv / MuskCultA beginners quickstart guide to Git
ericat / Git Tips:octocat: :thought_balloon: A collection of git tips https://gitpitch.com/ericat/git-tips/master?grs=github&t=white#
