Bash Commands Cheat Sheet | Red Hat Developer

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data-block-plugin-id="field_block:node:cheat_sheet:title"> <div> <h1>Bash Commands Cheat Sheet</h1> </div> </div> <div class="block block-rhd-author block-combined-author-block" data-block-plugin-id="combined_author_block"> <div> <div class="rhd-c-main-author-with-count rhd-c-card-tile__author"> <span class="rhd-c-main-author-with-count__author-image"></span> <div class='rhd-c-main-author-with-count__author-list'> <span class="rhd-c-main-author-with-count__author"> <span class="rhd-c-main-author-with-count__author-name"> Bob Reselman </span> </span> </div> </div> </div> </div> <div class="block block-layout-builder block-field-blocknodecheat-sheetfield-topics" data-block-plugin-id="field_block:node:cheat_sheet:field_topics"> <div> <dl class="related-tags related-tags-topics"> <dt class="tag-label">Related topics:</dt> <dd class="tag-links"><a href="/topics/linux" hreflang="en">Linux</a></dd> </dl> </div> </div> <div class="block block-layout-builder block-field-blocknodecheat-sheetfield-tax-product" data-block-plugin-id="field_block:node:cheat_sheet:field_tax_product"> <div> <dl class="related-tags related-tags-products"> <dt class="tag-label">Related products:</dt> <dd class="tag-links"><a href="/products/rhel/overview" hreflang="en">Red Hat Enterprise Linux</a></dd> </dl> </div> </div> <div class="block block-block-content block-block-content84360ccb-b845-4208-8450-4e174fcbbbdc share-buttons" data-block-plugin-id="block_content:84360ccb-b845-4208-8450-4e174fcbbbdc"> <h2>Share:</h2> <div class="a2a_kit a2a_default_style"> <a class="a2a_button_twitter" aria-label="Share on twitter"> <i class="fab fa-twitter fa-lg " title="Share on twitter"></i> </a> <a class="a2a_button_facebook" aria-label="Share on facebook"> <i class="fab fa-facebook-f fa-lg" title="Share on facebook"></i> </a> <a class="a2a_button_linkedin" aria-label="Share on linkedin"> <i class="fab fa-linkedin-in fa-lg" title="Share on linkedin"></i> </a> <a class="a2a_button_email" aria-label="Share with email"> <i class="fas fa-envelope fa-lg" title="Share with email"></i> </a> </div> </div> <div class="block block-layout-builder block-field-blocknodecheat-sheetcreated" data-block-plugin-id="field_block:node:cheat_sheet:created"> <div> <span><time datetime="2022-09-22T12:00:00+00:00">Sep 22, 2022</time> </span> </div> </div> <div class="block block-layout-builder block-field-blocknodecheat-sheetfield-language" data-block-plugin-id="field_block:node:cheat_sheet:field_language"> <div> <div class="field field--name-field-language field--type-list-string field--label-hidden field__items"> <div class="field__item">English</div> </div> </div> </div> <div class="rhd-auth-download pf-c-content block block-layout-builder block-field-blocknodecheat-sheetfield-cheat-sheet-download-url" data-block-plugin-id="field_block:node:cheat_sheet:field_cheat_sheet_download_url"> <div> <p> <a class="pf-c-button pf-m-heavy" href="https://developers.redhat.com/content-gateway/file/developers/Bash-commands-cheat-sheet-Red-Hat-Developer.pdf" data-rhd-qa-id="rhd_download_link_not_authenticated" data-analytics-region="body" data-analytics-category="download" data-analytics-linkType="content-gateway-file" data-analytics-text="download cheat sheets"> Download Cheat sheet </a> </p> </div> </div> </div> </div> <div class="layout layout--twocol-section layout--twocol-section--67-33 pf-u-mb-lg rhd-m-max-width-xl pf-l-grid pf-m-gutter layout--twocol"> <div class="pf-m-12-col pf-m-8-col-on-md layout__region pf-l-grid__item layout__region--first"> <div class="pf-c-content block block-layout-builder block-field-blocknodecheat-sheetbody" data-block-plugin-id="field_block:node:cheat_sheet:body"> <h2>About</h2> <div> <p>Get an easy-to-understand introduction to Bash, the powerful command-line shell and scripting language for Linux. With Bash scripting, you can automate repetitive tasks, manage system operations, and boost your overall coding productivity.</p><p>Our Bash scripting cheat sheet is a quick guide to running Bash scripts, explaining foundational concepts through helpful code examples. You'll learn how to perform the following tasks:</p><ul><li>Create Bash scripts using shebang headers or by directly calling the Bash interpreter</li><li>Declare variables</li><li>Manipulate strings using parameter expansion</li><li>Manage arrays and maps</li><li>Define functions for reusing code</li><li>Create conditional statements for decision-making</li><li>Use loops to process data</li><li>Report success and failure using exit codes</li></ul><p>Download the Bash cheat sheet and learn the basics of Bash shell scripting to start automating tasks efficiently within your Linux environment.</p><p>Red Hat Developer cheat sheets give you essential information right at your fingertips so you can work faster and smarter. Easily learn new technologies and coding concepts and quickly find the answers you need.</p> </div> </div> <div class="pf-c-content pf-u-pt-lg block block-layout-builder block-field-blocknodecheat-sheetfield-cheat-sheet-excerpt" data-block-plugin-id="field_block:node:cheat_sheet:field_cheat_sheet_excerpt"> <h2>Excerpt</h2> <div class="rhd-c-excerpt"> <h4>Creating an array</h4><p>The following creates an array with three elements and assigns the array to the variable named <code>my_array</code>.</p><pre><code class="language-plaintext">my_array=('Alex' 'Ada' 'Alexandra')</code></pre><h4>Adding an element to an array</h4><p>The following uses the <code>+=</code> operator to add an element with the value <code>Soto</code> to the array named <code>my_array</code>.</p><pre><code class="language-plaintext">my_array+=('Soto')</code></pre><h4>Removing an element to an array</h4><p>The following uses the <code>unset</code> keyword to remove the fourth element from the array named <code>my_array</code> at index <code>3</code>. </p><pre><code class="language-plaintext">unset my_array 3</code></pre> </div> </div> </div> <div class="pf-m-12-col pf-m-4-col-on-md layout__region pf-l-grid__item layout__region--second"> <div class="views-element-container block block-views block-views-blockrelated-resources-cheat-sheet-block-4" data-block-plugin-id="views_block:related_resources_cheat_sheet-block_4"> <h2>Related Cheat sheets</h2> <div> <div> <div class="view view-related-resources-cheat-sheet view-id-related_resources_cheat_sheet view-display-id-block_4 js-view-dom-id-413e9f95bbef24f72815d8652a6fb50eef66260b60edf8459b1f71f71a34395a"> <div class="view-content"> <div class="rhd-c-card-grid pf-c-content"> <div class="pf-l-flex rhd-c-card-grid__wrapper horizontal"> <div class='rhd-c-card-tile'> <div class='rhd-c-card-tile__image-content'> <div class="field field--name-field-cover-image field--type-entity-reference field--label-hidden field__items"> <div 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value="latam__ecuador">Ecuador</option> <option value="latam__el_salvador">El Salvador</option> <option value="latam__falkland_islands__malvinas_">Falkland Islands (Malvinas)</option> <option value="latam__french_guiana">French Guiana</option> <option value="latam__grenada">Grenada</option> <option value="latam__guatemala">Guatemala</option> <option value="latam__guyana">Guyana</option> <option value="latam__haiti">Haiti</option> <option value="latam__honduras">Honduras</option> <option value="latam__jamaica">Jamaica</option> <option value="latam__mexico">Mexico</option> <option value="latam__micronesia__federated_states_of">Micronesia, Federated States of</option> <option value="latam__montserrat">Montserrat</option> <option value="latam__nicaragua">Nicaragua</option> <option value="latam__panama">Panama</option> <option value="latam__paraguay">Paraguay</option> <option value="latam__peru">Peru</option> <option value="latam__puerto_rico">Puerto Rico</option> <option value="latam__saint_kitts_and_nevis">Saint Kitts and Nevis</option> <option value="latam__saint_lucia">Saint Lucia</option> <option value="latam__saint_vincent_and_the_grenadines">Saint Vincent and the Grenadines</option> <option value="latam__suriname">Suriname</option> <option value="latam__trinidad_and_tobago">Trinidad and Tobago</option> <option value="latam__turks_and_caicos_islands">Turks and Caicos Islands</option> <option value="latam__united_states_minor_outlying_islands">United States Minor Outlying Islands</option> <option value="latam__uruguay">Uruguay</option> <option value="latam__venezuela">Venezuela</option> <option value="latam__virgin_islands__british">Virgin Islands, British</option> <option value="latam__virgin_islands__u.s.">Virgin Islands, U.S.</option> </optgroup> </select> </pfe-select> </div> <div class="js-form-item form-item js-form-type-textfield form-item-zendesk-custom-field-customer-account-number 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