https://www.bencode.io/tags/bash/ Recent content in Bash on Benny Simmonds Hugo -- 0.149.1 en-us Fri, 19 Nov 2021 18:37:01 +0000 https://www.bencode.io/posts/2016-05-01-bash/ Sun, 01 May 2016 01:01:01 +0000 https://www.bencode.io/posts/2016-05-01-bash/ <p>Bash is a Unix shell written by Brian Fox in 1989 for the GNU Project as a free replacement for the <a href="https://en.wikipedia.org/wiki/Bourne_shell">Bourne shell</a>. To this day, Bash remains one of the most powerful and ubiquitous scripting tools on the planet.</p> <p><img alt="Brian Fox the creator of Bash" loading="lazy" src="https://www.bencode.io/images/bfox.jpg" title="Brian Fox the creator of Bash"></p> <h2 id="contents">Contents</h2> <ul> <li><a href="#useful-shortcuts">Useful Shortcuts</a></li> <li><a href="#initialisation">Initialisation</a></li> <li><a href="#shell-grammar">Shell Grammar</a> <ul> <li><a href="#variables">Variables</a> <ul> <li><a href="#local-variables">Local variables</a></li> <li><a href="#environment-variables">Environment variables</a></li> <li><a href="#positional-arguments">Positional arguments</a></li> </ul> </li> <li><a href="#expansions">Expansions</a> <ul> <li><a href="#brace-expansion">Brace expansion</a></li> <li><a href="#command-substitution">Command substitution</a></li> <li><a href="#arithmetic-expansion">Arithmetic expansion</a></li> <li><a href="#double-and-single-quotes">Double and single quotes</a></li> </ul> </li> <li><a href="#stream-redirection">Stream Redirection</a> <ul> <li><a href="#here-documents">here documents</a></li> </ul> </li> <li><a href="#arrays">Arrays</a></li> <li><a href="#conditions">Conditions</a> <ul> <li><a href="#if-statements">if statements</a></li> <li><a href="#case-statements">case statements</a></li> </ul> </li> </ul> </li> <li><a href="#loops">Loops</a> <ul> <li><a href="#for-loops">For Loops</a></li> <li><a href="#select-loops">Select Loops</a></li> <li><a href="#while-loops">While Loops</a></li> <li><a href="#until-loops">Until Loops</a></li> </ul> </li> <li><a href="#functions">Functions</a></li> <li><a href="#coprocesses">Coprocesses</a></li> <li><a href="#builtins">Builtins</a></li> <li><a href="#bash-recipes">Bash Recipes</a> <ul> <li><a href="#top-6-largest-things-in-the-current-directory">Top 6 largest things in the current directory</a></li> <li><a href="#display-the-23rd-line-of-etcpasswd">Display the 23rd line of /etc/passwd</a></li> <li><a href="#filter-the-first-column-from-process-status">Filter the first column from process status</a></li> <li><a href="#delete-subversion-scrap-files">Delete Subversion scrap files</a></li> <li><a href="#move-shell-scripts-and-mark-them-as-executable">Move shell scripts and mark them as executable</a></li> <li><a href="#pattern-matching">Pattern matching</a></li> <li><a href="#scan-code-base-against-list-of-patterns">Scan code base against list of patterns</a></li> <li><a href="#rename-multiple-files">Rename Multiple Files</a></li> <li><a href="#run-a-command-every-time-a-file-is-modified">Run a command every time a file is modified</a></li> <li><a href="#keep-a-program-running-after-leaving-ssh-session">Keep a program running after leaving SSH session</a></li> <li><a href="#simple-menu-and-functions">Simple menu and functions</a></li> <li><a href="#complete-example">Complete example</a></li> </ul> </li> <li><a href="#resources">Resources</a></li> </ul> <p>Kudos to Denys Dovhan and his awesome <a href="https://github.com/denysdovhan/Bash-handbook">Bash handbook</a>. The most digestable, and enjoyable method I&rsquo;ve found to groking bash. &lt;3</p>