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<link rel="search" type="application/opensearchdescription+xml" title="foomo project docs" href="/opensearch.xml"><title data-react-helmet="true">(Random) essentials | foomo project docs</title><meta data-react-helmet="true" name="twitter:card" content="summary_large_image"><meta data-react-helmet="true" property="og:url" content="https://www.foomo.org/docs/general/essentials"><meta data-react-helmet="true" name="docsearch:language" content="en"><meta data-react-helmet="true" name="docsearch:version" content="current"><meta data-react-helmet="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-react-helmet="true" property="og:title" content="(Random) essentials | foomo project docs"><meta data-react-helmet="true" name="description" content="Markdown"><meta data-react-helmet="true" property="og:description" content="Markdown"><link data-react-helmet="true" rel="icon" href="/img/favicon.ico"><link data-react-helmet="true" rel="canonical" href="https://www.foomo.org/docs/general/essentials"><link data-react-helmet="true" rel="alternate" href="https://www.foomo.org/docs/general/essentials" hreflang="en"><link data-react-helmet="true" rel="alternate" href="https://www.foomo.org/docs/general/essentials" hreflang="x-default"><link data-react-helmet="true" rel="preconnect" href="https://SUATUVZDDM-dsn.algolia.net" crossorigin="anonymous"><link rel="stylesheet" href="/assets/css/styles.47738ace.css">
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class="docMainContainer_r8cw"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_zHA2"><div class="docItemContainer_oiyr"><article><div class="tocCollapsible_aw-L theme-doc-toc-mobile tocMobile_Tx6Y"><button type="button" class="clean-btn tocCollapsibleButton_zr6a">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>(Random) essentials</h1></header><h2 class="anchor anchorWithStickyNavbar_y2LR" id="markdown">Markdown<a class="hash-link" href="#markdown" title="Direct link to heading"></a></h2><p>Learn markdown(this is a markdown document 🤓)</p><ul><li>original markdown docs by John Gruber <a href="https://daringfireball.net/projects/markdown/" target="_blank" rel="noopener noreferrer">https://daringfireball.net/projects/markdown/</a></li><li>a cheatsheet <a href="https://www.markdownguide.org/cheat-sheet/" target="_blank" rel="noopener noreferrer">https://www.markdownguide.org/cheat-sheet/</a></li><li><a href="https://docs.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax" target="_blank" rel="noopener noreferrer">githubs markdown docs</a></li></ul><h2 class="anchor anchorWithStickyNavbar_y2LR" id="vim">Vim<a class="hash-link" href="#vim" title="Direct link to heading"></a></h2><p><a href="https://www.vim.org/" target="_blank" rel="noopener noreferrer">Vim</a> is everywhere so no matter if you ssh into a place or try to edit a file in a container, you are going to need it.</p><p>Here is a super minimal cheat sheet:</p><div class="codeBlockContainer_J+bg language-shell theme-code-block"><div class="codeBlockContent_csEI shell"><pre tabindex="0" class="prism-code language-shell codeBlock_rtdJ thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_1zSZ"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># edit/create a file</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">vim</span><span class="token plain"> path/file</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" class="copyButton_M3SB clean-btn">Copy</button></div></div><p>Now the shortcuts:</p><table style="width:100%"><thead><tr><th>shortcut</th><th>function</th><th>note</th></tr></thead><tbody><tr><td><code>:h<enter></code></td><td>help</td><td>a bit overwhelming</td></tr><tr><td><code>:q<enter></code></td><td>quit</td><td>immediate instinct after looking at help 🤣</td></tr><tr><td><code>:q!<enter></code></td><td>quit ignoring changes</td><td>! means, that you actually mean it and can be combined with a lot of commands</td></tr><tr><td><code>:w<enter></code></td><td>write / save file</td><td></td></tr><tr><td><code>:x<enter></code></td><td> save and exit</td><td></td></tr><tr><td><code>:x!<enter></code></td><td> force save and exit</td><td></td></tr><tr><td><code>11G</code></td><td>go to line 11</td><td></td></tr><tr><td><code>$</code></td><td> go to last char in line</td><td></td></tr><tr><td><code>dd</code></td><td>delete line</td><td></td></tr><tr><td><code>x</code></td><td> delete char</td><td></td></tr><tr><td><code>i</code></td><td> enter insert mode</td><td>that is where you can actually edit stuff - press escape to exit insert mode</td></tr><tr><td><code><esc></code></td><td>exit insert mode</td><td></td></tr><tr><td><code><ctrl>v</code></td><td>visual block</td><td>then use cursors to edit selection</td></tr><tr><td><code>x</code></td><td>cut</td><td></td></tr><tr><td><code>p</code></td><td>paste</td><td></td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_y2LR" id="ssh">ssh<a class="hash-link" href="#ssh" title="Direct link to heading"></a></h2><p>allows you to remotely and securely log into computers - <code>man ssh</code> should be available on any shell.</p><p>digital ocean has a decent intro into ssh <a href="https://www.digitalocean.com/community/tutorials/ssh-essentials-working-with-ssh-servers-clients-and-keys" target="_blank" rel="noopener noreferrer">https://www.digitalocean.com/community/tutorials/ssh-essentials-working-with-ssh-servers-clients-and-keys</a></p><p>There is a lot of other tutorials - your typical use cases will be:</p><ul><li>logging into other computers</li><li>executing commands on those computers</li><li>tunneling network connections</li></ul><p>Once ssh is set up correctly <code>scp</code>, <code>git</code> and a lot of other programs, that rely on ssh under the covers are fun to use too.</p><h2 class="anchor anchorWithStickyNavbar_y2LR" id="git">git<a class="hash-link" href="#git" title="Direct link to heading"></a></h2><p><a href="https://git-scm.com/doc" target="_blank" rel="noopener noreferrer">https://git-scm.com/doc</a></p><h2 class="anchor anchorWithStickyNavbar_y2LR" id="github">github<a class="hash-link" href="#github" title="Direct link to heading"></a></h2><p>Yes despite the fact, that m$ bought them, we use them and you have to enable <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication" target="_blank" rel="noopener noreferrer">2fa</a></p><h2 class="anchor anchorWithStickyNavbar_y2LR" id="some-data-formats">Some data formats<a class="hash-link" href="#some-data-formats" title="Direct link to heading"></a></h2><h3 class="anchor anchorWithStickyNavbar_y2LR" id="yaml">yaml<a class="hash-link" href="#yaml" title="Direct link to heading"></a></h3><p><a href="https://yaml.org/" target="_blank" rel="noopener noreferrer">https://yaml.org/</a> some love it for good a reason, some hate it for another good reason, but atm there is just no way around it.</p><h3 class="anchor anchorWithStickyNavbar_y2LR" id="json">json<a class="hash-link" href="#json" title="Direct link to heading"></a></h3><p><a href="https://www.json.org/json-en.html" target="_blank" rel="noopener noreferrer">https://www.json.org/json-en.html</a> similar love and hate situation like with yaml - also no way out.</p><h3 class="anchor anchorWithStickyNavbar_y2LR" id="csv">CSV<a class="hash-link" href="#csv" title="Direct link to heading"></a></h3><p>If you think parsing or serializing CSV is trivial, you have been warned. </p><p><a href="https://datatracker.ietf.org/doc/html/rfc4180" target="_blank" rel="noopener noreferrer">https://datatracker.ietf.org/doc/html/rfc4180</a> </p><h3 class="anchor anchorWithStickyNavbar_y2LR" id="protocol-buffers">protocol buffers<a class="hash-link" href="#protocol-buffers" title="Direct link to heading"></a></h3><p>Fast, compact not human readable - not necessary for most use cases</p><p><a href="https://developers.google.com/protocol-buffers" target="_blank" rel="noopener noreferrer">https://developers.google.com/protocol-buffers</a></p><h3 class="anchor anchorWithStickyNavbar_y2LR" id="xml">xml<a class="hash-link" href="#xml" title="Direct link to heading"></a></h3><p><a href="https://www.w3.org/TR/REC-xml/" target="_blank" rel="noopener noreferrer">https://www.w3.org/TR/REC-xml/</a> only little love here</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/foomo/foomo-docs/tree/main/foomo/docs/general/essentials.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_mS5F" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col 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toc-highlight">ssh</a></li><li><a href="#git" class="table-of-contents__link toc-highlight">git</a></li><li><a href="#github" class="table-of-contents__link toc-highlight">github</a></li><li><a href="#some-data-formats" class="table-of-contents__link toc-highlight">Some data formats</a><ul><li><a href="#yaml" class="table-of-contents__link toc-highlight">yaml</a></li><li><a href="#json" class="table-of-contents__link toc-highlight">json</a></li><li><a href="#csv" class="table-of-contents__link toc-highlight">CSV</a></li><li><a href="#protocol-buffers" class="table-of-contents__link toc-highlight">protocol buffers</a></li><li><a href="#xml" class="table-of-contents__link toc-highlight">xml</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">legal</div><ul class="footer__items"><li class="footer__item"><a 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