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+<!doctypehtml><html class="sidebar-visible no-js light"lang=en><head><meta charset=UTF-8><title>Page not found - Linux Command Line Computing</title><base href=/cli-computing/><meta content="text/html; charset=utf-8"http-equiv=Content-Type><meta content="Linux Command Line and Shell Scripting for beginner to intermediate level users"name=description><meta content=width=device-width,initial-scale=1 name=viewport><meta content=#ffffff name=theme-color><meta content="Linux Command Line Computing"property=og:title><meta content=website property=og:type><meta content="Linux Command Line and Shell Scripting for beginner to intermediate level users"property=og:description><meta content=https://learnbyexample.github.io/cli-computing/ property=og:url><meta content=https://learnbyexample.github.io/cli-computing/images/cli_computing_ls.png property=og:image><meta content=1280 property=og:image:width><meta content=720 property=og:image:height><meta content=summary_large_image property=twitter:card><meta content=@learn_byexample property=twitter:site><link href=favicon.svg rel=icon><link rel="shortcut icon"href=favicon.png><link href=css/variables.css rel=stylesheet><link href=css/general.css rel=stylesheet><link href=css/chrome.css rel=stylesheet><link href=FontAwesome/css/font-awesome.css rel=stylesheet><link href=fonts/fonts.css rel=stylesheet><link href=highlight.css rel=stylesheet><link href=tomorrow-night.css rel=stylesheet><link href=ayu-highlight.css rel=stylesheet><link href=style.css rel=stylesheet><body><script>var path_to_root = "";
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-            html.classList.add("sidebar-" + sidebar);</script><nav aria-label="Table of contents"class=sidebar id=sidebar><div class=sidebar-scrollbox><ol class=chapter><li class="chapter-item expanded affix"><a href=cover.html>Cover</a><li class="chapter-item expanded affix"><a href=buy.html>Buy PDF/EPUB versions</a><li class="chapter-item expanded affix"><a href=preface.html>Preface</a><li class="chapter-item expanded"><a href=introduction-setup.html><strong aria-hidden=true>1.</strong> Introduction and Setup</a><li class="chapter-item expanded"><a href=command-line-overview.html><strong aria-hidden=true>2.</strong> Command Line Overview</a><li class="chapter-item expanded"><a href=managing-files-directories.html><strong aria-hidden=true>3.</strong> Managing Files and Directories</a><li class="chapter-item expanded"><a href=shell-features.html><strong aria-hidden=true>4.</strong> Shell Features</a><li class="chapter-item expanded"><a href=viewing-part-or-whole-file-contents.html><strong aria-hidden=true>5.</strong> Viewing Part or Whole File Contents</a><li class="chapter-item expanded"><a href=searching-files-and-filenames.html><strong aria-hidden=true>6.</strong> Searching Files and Filenames</a><li class="chapter-item expanded"><a href=file-properties.html><strong aria-hidden=true>7.</strong> File Properties</a><li class="chapter-item expanded"><a href=managing-processes.html><strong aria-hidden=true>8.</strong> Managing Processes</a><li class="chapter-item expanded"><a href=multipurpose-text-processing-tools.html><strong aria-hidden=true>9.</strong> Multipurpose Text Processing Tools</a><li class="chapter-item expanded"><a href=sorting-stuff.html><strong aria-hidden=true>10.</strong> Sorting Stuff</a><li class="chapter-item expanded"><a href=comparing-files.html><strong aria-hidden=true>11.</strong> Comparing Files</a><li class="chapter-item expanded"><a href=assorted-text-processing-tools.html><strong aria-hidden=true>12.</strong> Assorted Text Processing Tools</a><li class="chapter-item expanded"><a href=shell-scripting.html><strong aria-hidden=true>13.</strong> Shell Scripting</a><li class="chapter-item expanded"><a href=shell-customization.html><strong aria-hidden=true>14.</strong> Shell Customization</a><li class="chapter-item expanded affix"><a href=exercise-solutions.html>Exercise Solutions</a></li><br><hr><li class="chapter-item expanded"><i class="fa fa-github"id=git-repository-button></i><a href=https://github.com/learnbyexample/cli-computing>   Source code</a><li class="chapter-item expanded"><i class="fa fa-home"id=home-button></i><a href=https://learnbyexample.github.io/>   My Blog</a><li class="chapter-item expanded"><i class="fa fa-book"id=book-button></i><a href=https://learnbyexample.github.io/books/>   My Books</a><li class="chapter-item expanded"><i class="fa fa-envelope"id=mail-button></i><a href=https://learnbyexample.gumroad.com/l/learnbyexample-weekly>   learnbyexample weekly</a><li class="chapter-item expanded"><i class="fa fa-twitter"id=twitter-button></i><a href=https://twitter.com/learn_byexample>   Twitter</a></ol></div><div class=sidebar-resize-handle id=sidebar-resize-handle></div></nav><div class=page-wrapper id=page-wrapper><div class=page><div id=menu-bar-hover-placeholder></div><div class="menu-bar sticky bordered"id=menu-bar><div class=left-buttons><button aria-label="Toggle Table of Contents"title="Toggle Table of Contents"aria-controls=sidebar class=icon-button id=sidebar-toggle type=button><i class="fa fa-bars"></i></button><button aria-label="Change theme"title="Change theme"aria-controls=theme-list aria-expanded=false aria-haspopup=true class=icon-button id=theme-toggle type=button><i class="fa fa-paint-brush"></i></button><ul aria-label=Themes class=theme-popup id=theme-list role=menu><li role=none><button class=theme id=light role=menuitem>Light (default)</button><li role=none><button class=theme id=rust role=menuitem>Rust</button><li role=none><button class=theme id=coal role=menuitem>Coal</button><li role=none><button class=theme id=navy role=menuitem>Navy</button><li role=none><button class=theme id=ayu role=menuitem>Ayu</button></ul><button aria-label="Toggle Searchbar"title="Search. 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+            html.classList.add("sidebar-" + sidebar);</script><nav aria-label="Table of contents"class=sidebar id=sidebar><div class=sidebar-scrollbox><ol class=chapter><li class="chapter-item expanded affix"><a href=cover.html>Cover</a><li class="chapter-item expanded affix"><a href=buy.html>Buy PDF/EPUB versions</a><li class="chapter-item expanded affix"><a href=preface.html>Preface</a><li class="chapter-item expanded"><a href=introduction-setup.html><strong aria-hidden=true>1.</strong> Introduction and Setup</a><li class="chapter-item expanded"><a href=command-line-overview.html><strong aria-hidden=true>2.</strong> Command Line Overview</a><li class="chapter-item expanded"><a href=managing-files-directories.html><strong aria-hidden=true>3.</strong> Managing Files and Directories</a><li class="chapter-item expanded"><a href=shell-features.html><strong aria-hidden=true>4.</strong> Shell Features</a><li class="chapter-item expanded"><a href=viewing-part-or-whole-file-contents.html><strong aria-hidden=true>5.</strong> Viewing Part or Whole File Contents</a><li class="chapter-item expanded"><a href=searching-files-and-filenames.html><strong aria-hidden=true>6.</strong> Searching Files and Filenames</a><li class="chapter-item expanded"><a href=file-properties.html><strong aria-hidden=true>7.</strong> File Properties</a><li class="chapter-item expanded"><a href=managing-processes.html><strong aria-hidden=true>8.</strong> Managing Processes</a><li class="chapter-item expanded"><a href=multipurpose-text-processing-tools.html><strong aria-hidden=true>9.</strong> Multipurpose Text Processing Tools</a><li class="chapter-item expanded"><a href=sorting-stuff.html><strong aria-hidden=true>10.</strong> Sorting Stuff</a><li class="chapter-item expanded"><a href=comparing-files.html><strong aria-hidden=true>11.</strong> Comparing Files</a><li class="chapter-item expanded"><a href=assorted-text-processing-tools.html><strong aria-hidden=true>12.</strong> Assorted Text Processing Tools</a><li class="chapter-item expanded"><a href=shell-scripting.html><strong aria-hidden=true>13.</strong> Shell Scripting</a><li class="chapter-item expanded"><a href=shell-customization.html><strong aria-hidden=true>14.</strong> Shell Customization</a><li class="chapter-item expanded affix"><a href=exercise-solutions.html>Exercise Solutions</a></li><br><hr><li class="chapter-item expanded"><i class="fa fa-github"id=git-repository-button></i><a href=https://github.com/learnbyexample/cli-computing>   Source code</a><li class="chapter-item expanded"><i class="fa fa-home"id=home-button></i><a href=https://learnbyexample.github.io/>   My Blog</a><li class="chapter-item expanded"><i class="fa fa-book"id=book-button></i><a href=https://learnbyexample.github.io/books/>   My Books</a><li class="chapter-item expanded"><i class="fa fa-envelope"id=mail-button></i><a href=https://learnbyexample.gumroad.com/l/learnbyexample-weekly>   learnbyexample weekly</a><li class="chapter-item expanded"><i class="fa fa-twitter"id=twitter-button></i><a href=https://twitter.com/learn_byexample>   Twitter</a></ol></div><div class=sidebar-resize-handle id=sidebar-resize-handle></div></nav><div class=page-wrapper id=page-wrapper><div class=page><div id=menu-bar-hover-placeholder></div><div class="menu-bar sticky bordered"id=menu-bar><div class=left-buttons><button aria-label="Toggle Table of Contents"title="Toggle Table of Contents"aria-controls=sidebar class=icon-button id=sidebar-toggle type=button><i class="fa fa-bars"></i></button><button aria-label="Change theme"title="Change theme"aria-controls=theme-list aria-expanded=false aria-haspopup=true class=icon-button id=theme-toggle type=button><i class="fa fa-paint-brush"></i></button><ul aria-label=Themes class=theme-popup id=theme-list role=menu><li role=none><button class=theme id=light role=menuitem>Light (default)</button><li role=none><button class=theme id=rust role=menuitem>Rust</button><li role=none><button class=theme id=coal role=menuitem>Coal</button><li role=none><button class=theme id=navy role=menuitem>Navy</button><li role=none><button class=theme id=ayu role=menuitem>Ayu</button></ul><button aria-label="Toggle Searchbar"title="Search. 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