{"id":11027,"date":"2024-03-14T13:16:47","date_gmt":"2024-03-14T13:16:47","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-do-you-use-a-while-loop-to-read-files-in-linux\/"},"modified":"2025-08-04T06:44:37","modified_gmt":"2025-08-04T06:44:37","slug":"how-do-you-use-a-while-loop-to-read-files-in-linux","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-do-you-use-a-while-loop-to-read-files-in-linux\/","title":{"rendered":"Read Files in Linux with While Loop"},"content":{"rendered":"<p>The method of using a while loop to read a file in Linux is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#!\/bin\/bash<\/span>\r\n\r\n<span class=\"hljs-comment\"># \u5b9a\u4e49\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u540d<\/span>\r\nfile=<span class=\"hljs-string\">\"file.txt\"<\/span>\r\n\r\n<span class=\"hljs-comment\"># \u4f7f\u7528while\u5faa\u73af\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9<\/span>\r\n<span class=\"hljs-keyword\">while<\/span> IFS= <span class=\"hljs-built_in\">read<\/span> -r line; <span class=\"hljs-keyword\">do<\/span>\r\n    <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"<span class=\"hljs-variable\">$line<\/span>\"<\/span>\r\n<span class=\"hljs-keyword\">done<\/span> &lt; <span class=\"hljs-string\">\"<span class=\"hljs-variable\">$file<\/span>\"<\/span>\r\n<\/code><\/pre>\n<p>The code above first specifies the file name to be read as file.txt, then uses a while loop structure to read the file line by line and print it to the terminal. Within the loop, the command IFS= read -r line is used to read each line of the file and save it in the variable &#8220;line,&#8221; then it is printed to the terminal using echo &#8220;$line&#8221; command.<\/p>\n<p>By running the script above, you can read the content of the file file.txt line by line and output it to the terminal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The method of using a while loop to read a file in Linux is as follows: #!\/bin\/bash # \u5b9a\u4e49\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u540d file=&#8221;file.txt&#8221; # \u4f7f\u7528while\u5faa\u73af\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9 while IFS= read -r line; do echo &#8220;$line&#8221; done &lt; &#8220;$file&#8221; The code above first specifies the file name to be read as file.txt, then uses a while loop structure to read the [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[4576,317,1148,297,7274],"class_list":["post-11027","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-bash-scripting","tag-command-line","tag-file-reading","tag-linux","tag-while-loop"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Read Files in Linux with While Loop - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use while loops to read files in Linux. 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