https://meerstory.com/en/categories/linux/Recent content in Linux on MeerStoryHugoen-usSat, 29 Aug 2026 07:24:21 +0900https://meerstory.com/en/ubuntu/20260829_072317_5_more_less_more_less/Sat, 29 Aug 2026 07:24:21 +0900https://meerstory.com/en/ubuntu/20260829_072317_5_more_less_more_less/<h2 id="overview">Overview</h2> <p>Learn the key differences between the <code>more</code> and <code>less</code> commands, which are frequently used when checking large text files or logs in the Linux terminal. By comparing the operation methods and navigation features of both commands, this guide presents the optimal file viewing method for practical work environments.</p> <h2 id="1-basics-of-the-more-command-page-by-page-text-viewing">1. Basics of the <code>more</code> Command: Page-by-Page Text Viewing</h2> <p>To create a test data file for practicing the <code>more</code> command, run the command <code>seq 1 50 &gt; sample_more.txt</code>.</p>https://meerstory.com/en/ubuntu/20260829_071913_4_less_less/Sat, 29 Aug 2026 07:19:40 +0900https://meerstory.com/en/ubuntu/20260829_071913_4_less_less/<h2 id="overview">Overview</h2> <p>In a Linux environment, opening large files or logs of several hundred megabytes using the <code>cat</code> command can cause memory overload and terminal lag. Using the <code>less</code> command allows you to view text quickly page by page and navigate efficiently without loading the entire file into memory. In this article, we will introduce practical tips for viewing long files and searching for keywords using the <code>less</code> command in the Ubuntu terminal.</p>https://meerstory.com/en/ubuntu/20260829_071443_3_cat_cat/Sat, 29 Aug 2026 07:14:59 +0900https://meerstory.com/en/ubuntu/20260829_071443_3_cat_cat/<h2 id="overview">Overview</h2> <p>This guide covers everything from the basics to practical applications of the <code>cat</code> command, one of the most widely used commands in Linux and Ubuntu terminals. Beyond simply displaying file contents, we introduce features such as displaying line numbers, visualizing whitespace/non-printing characters, file concatenation, and creating files using EOF (Heredoc) along with practical examples.</p> <h2 id="1-basic-usage-of-cat-command-and-instantly-viewing-text-file-contents">1. Basic Usage of cat Command and Instantly Viewing Text File Contents</h2> <p>Run the command <code>echo &quot;Hello Ubuntu 24.04 LTS World!&quot; &gt; sample.txt</code> to create a sample text file to be used for practicing the <code>cat</code> command.</p>https://meerstory.com/en/ubuntu/20260829_071032_2_ls_ls/Sat, 29 Aug 2026 07:11:01 +0900https://meerstory.com/en/ubuntu/20260829_071032_2_ls_ls/<h2 id="overview">Overview</h2> <p>This guide introduces the core options and practical usage of the <code>ls</code> command, which is the most fundamental command in Linux and Ubuntu environments. Beyond simply listing file names, it covers file organization know-how that can be immediately applied in practice, including detailed file information, human-readable file sizes, hidden file viewing, and sorting techniques.</p> <h2 id="1-basic-file-list-viewing-hidden-files-and-detailed-permissions-ls--l-ls--al">1. Basic File List Viewing, Hidden Files, and Detailed Permissions (ls -l, ls -al)</h2> <p>To create and navigate to a dedicated directory for practicing <code>ls</code> commands and prepare regular and hidden files, run the <code>mkdir -p ~/ls_demo &amp;&amp; cd ~/ls_demo &amp;&amp; touch file1.txt file2.log .hidden_config</code> command.</p>https://meerstory.com/en/ubuntu/20260829_070614_1_ls_al_ls/Sat, 29 Aug 2026 07:06:42 +0900https://meerstory.com/en/ubuntu/20260829_070614_1_ls_al_ls/<h2 id="overview">Overview</h2> <p>The most basic and important command in Linux and Ubuntu terminal environments is <code>ls</code>, which displays files and directories. In this post, we will explore in detail how to use the <code>ls -al</code> option to check file permissions, owners, and even hidden files starting with a dot (<code>.</code>) at a glance, along with practical examples.</p> <h2 id="1-basic-usage-of-ls-and-checking-detailed-file-information-ls-ls--l">1. Basic Usage of ls and Checking Detailed File Information (ls, ls -l)</h2> <p>Run the command <code>mkdir -p ~/ls_demo &amp;&amp; cd ~/ls_demo</code> to create and move into a dedicated workspace for practicing the <code>ls</code> command.</p>