https://meerstory.com/en/tags/ubuntu-commands/Recent content in Ubuntu Commands on MeerStoryHugoen-usSat, 29 Aug 2026 07:19:40 +0900https://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>