{"id":197973,"date":"2026-03-17T20:11:30","date_gmt":"2026-03-17T20:11:30","guid":{"rendered":"https:\/\/ushopwell.com\/ublog\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\/"},"modified":"2026-03-17T20:11:30","modified_gmt":"2026-03-17T20:11:30","slug":"linux-for-beginners-streams-pipes-and-text-filters-lesson-7","status":"publish","type":"post","link":"https:\/\/ushopwell.com\/ublog\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\/","title":{"rendered":"Linux for Beginners: Streams, Pipes, and Text Filters | Lesson 7"},"content":{"rendered":"<div class=\"youtubomatic-video-container\"><iframe loading=\"lazy\" width=\"580\" height=\"380\" src=\"https:\/\/www.youtube.com\/embed\/rWhcMYZYlDg?autoplay=1&#038;controls=1&#038;hl=en\" frameborder=\"0\" allowfullscreen><\/iframe><\/div>\n<p>\u25b6 Linux for Beginners Playlist:<br \/>\n<a href=\"https:\/\/www.youtube.com\/playlist?list=PLUHnYREC5ofibzDBqvIxjdWhDmSjfrnIa\" target=\"_blank\">https:\/\/www.youtube.com\/playlist?list=PLUHnYREC5ofibzDBqvIxjdWhDmSjfrnIa<\/a><\/p>\n<p>In this lesson, you will learn how Linux handles standard input, standard output, and standard error. We will cover redirection, pipes, tee, \/dev\/null, and the most useful text filtering tools like grep, sort, uniq, wc, cut, tr, awk, and sed. These are essential Linux basics for shell work, log analysis, and DevOps practice.<\/p>\n<p>00: 00 Introduction<br \/>\n00: 33 stdin, stdout, and stderr explained<br \/>\n02: 36 Output redirection in Linux<br \/>\n05: 48 Linux pipe and tee command<br \/>\n08: 32 \/dev\/null explained<br \/>\n10: 58 grep and basic regular expressions<br \/>\n13: 47 sort, uniq -c, and wc -l<br \/>\n16: 32 cut and tr commands<br \/>\n19: 23 awk for columns<br \/>\n21: 52 sed for simple text replacement<br \/>\n23: 20 Lesson summary<\/p>\n<p>Commands used in this lesson:<br \/>\ngrep \u2014 searches for lines that match a word or pattern<br \/>\ngrep -i \u2014 searches without case sensitivity<br \/>\ngrep -v \u2014 shows lines that do not match the pattern<br \/>\nsort \u2014 sorts lines alphabetically<br \/>\nuniq \u2014 removes adjacent duplicate lines<br \/>\nuniq -c \u2014 counts repeated lines<br \/>\nwc -l \u2014 counts the number of lines<br \/>\ncut \u2014 extracts selected parts of each line<br \/>\ncut -d: -f1 \u2014 takes the first field separated by a colon<br \/>\ntr \u2014 replaces or deletes individual characters<br \/>\nawk \u2014 processes text by fields and columns<br \/>\nawk &#8216;{print $1}&#8217; \u2014 prints the first column<br \/>\nsed \u2014 edits text in a stream<br \/>\nsed &#8216;s\/old\/new\/&#8217; \u2014 replaces the first match in a line<br \/>\ntee \u2014 shows output on the screen and saves it to a file<br \/>\ntee -a \u2014 appends output to the end of a file<\/p>\n<p>#Linux #Ubuntu #DevOps<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u25b6 Linux for Beginners Playlist: https:\/\/www.youtube.com\/playlist?list=PLUHnYREC5ofibzDBqvIxjdWhDmSjfrnIa In this lesson, you will learn how Linux handles standard input, standard output, and standard error. We will cover redirection, pipes, tee, \/dev\/null, and the most useful text filtering tools like grep, sort, uniq, wc, cut, tr, awk, and sed. These are essential Linux basics for shell work, log analysis, and DevOps practice. 00: 00 Introduction 00: 33 stdin, stdout, and stderr explained 02:&#8230;<\/p>\n","protected":false},"author":1,"featured_media":197974,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-197973","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Linux for Beginners: Streams, Pipes, and Text Filters | Lesson 7 - UshopWell.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ushopwell.com\/ublog\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux for Beginners: Streams, Pipes, and Text Filters | Lesson 7 - UshopWell.com\" \/>\n<meta property=\"og:description\" content=\"\u25b6 Linux for Beginners Playlist: https:\/\/www.youtube.com\/playlist?list=PLUHnYREC5ofibzDBqvIxjdWhDmSjfrnIa In this lesson, you will learn how Linux handles standard input, standard output, and standard error. We will cover redirection, pipes, tee, \/dev\/null, and the most useful text filtering tools like grep, sort, uniq, wc, cut, tr, awk, and sed. These are essential Linux basics for shell work, log analysis, and DevOps practice. 00: 00 Introduction 00: 33 stdin, stdout, and stderr explained 02:...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ushopwell.com\/ublog\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\/\" \/>\n<meta property=\"og:site_name\" content=\"UshopWell.com\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-17T20:11:30+00:00\" \/>\n<meta name=\"author\" content=\"UShopWell\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"UShopWell\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/\"},\"author\":{\"name\":\"UShopWell\",\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/#\\\/schema\\\/person\\\/6fd1f9e0ff932e534c86c70d5acff0fc\"},\"headline\":\"Linux for Beginners: Streams, Pipes, and Text Filters | Lesson 7\",\"datePublished\":\"2026-03-17T20:11:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/\"},\"wordCount\":252,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/197973\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/\",\"url\":\"https:\\\/\\\/ushopwell.com\\\/ublog\\\/linux-for-beginners-streams-pipes-and-text-filters-lesson-7\\\/\",\"name\":\"Linux for Beginners: Streams, Pipes, and Text Filters | Lesson 7 - 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