{"id":1531,"date":"2017-01-27T09:44:07","date_gmt":"2017-01-27T09:44:07","guid":{"rendered":"http:\/\/data-flair.training\/blogs\/?p=1531"},"modified":"2018-11-15T14:47:57","modified_gmt":"2018-11-15T09:17:57","slug":"important-linux-commands","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/important-linux-commands\/","title":{"rendered":"Important Linux Commands With Syntax &#8211; Part 5"},"content":{"rendered":"<div class='__iawmlf-post-loop-links' style='display:none;' data-iawmlf-post-links='[{&quot;id&quot;:1162,&quot;href&quot;:&quot;https:\\\/\\\/en.wikipedia.org\\\/wiki\\\/List_of_Unix_commands&quot;,&quot;archived_href&quot;:&quot;http:\\\/\\\/web-wp.archive.org\\\/web\\\/20250823005315\\\/https:\\\/\\\/en.wikipedia.org\\\/wiki\\\/List_of_Unix_commands&quot;,&quot;redirect_href&quot;:&quot;&quot;,&quot;checks&quot;:[{&quot;date&quot;:&quot;2025-12-09 02:18:02&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-15 08:19:37&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-18 12:58:42&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-29 07:38:49&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-01 18:46:31&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-07 10:50:04&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-23 06:22:48&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-26 12:17:33&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-29 18:21:14&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-03 06:57:29&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-06 12:18:07&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-12 14:06:58&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-16 13:36:47&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-23 03:36:29&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-26 11:49:06&quot;,&quot;http_code&quot;:404},{&quot;date&quot;:&quot;2026-03-03 10:08:40&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-09 09:44:33&quot;,&quot;http_code&quot;:429},{&quot;date&quot;:&quot;2026-03-13 03:09:09&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-16 15:47:27&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-21 22:01:36&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-25 09:02:54&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-10 02:24:01&quot;,&quot;http_code&quot;:429},{&quot;date&quot;:&quot;2026-04-18 17:26:40&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-30 01:35:38&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-06 11:09:43&quot;,&quot;http_code&quot;:429},{&quot;date&quot;:&quot;2026-05-13 13:11:15&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-16 16:25:58&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-22 04:18:04&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-28 12:41:39&quot;,&quot;http_code&quot;:200}],&quot;broken&quot;:false,&quot;last_checked&quot;:{&quot;date&quot;:&quot;2026-05-28 12:41:39&quot;,&quot;http_code&quot;:200},&quot;process&quot;:&quot;done&quot;}]'><\/div>\n<h2>1. Important Linux Commands<\/h2>\n<p>In this tutorial, you will learn important Linux commands that are required to become a Linux expert and would help you in learning Linux programming. These are some of the top Linux commands with syntax and examples. You have already seen basic commands in <a href=\"http:\/\/data-flair.training\/blogs\/frequent-linux-commands-beginners-tutorial\/\">Linux commands Part 1<\/a> and <a href=\"http:\/\/data-flair.training\/blogs\/frequently-used-linux-commands\/\">Linux commands Part 2<\/a>. <a href=\"http:\/\/data-flair.training\/blogs\/linux-commands-list-linux-programming-part-3\/\">Commands on Linux Part 3<\/a> and <a href=\"http:\/\/data-flair.training\/blogs\/commonly-used-linux-commands-list-part-4\/\">Linux commands for programming Part 4<\/a> covered some advanced commands. This linux tutorial covers commands like history, sudo, clear, su, wc, exit, sort, date, cal, gzip that will further help you in enhancing Linux knowledge.<\/p>\n<p>So, let&#8217;s start Important Linux Commands.<\/p>\n<div id=\"attachment_42182\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-42182\" class=\"size-full wp-image-42182\" src=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01.jpg\" alt=\"Important Linux Commands With Syntax - Part 5\" width=\"1200\" height=\"628\" srcset=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01.jpg 1200w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01-150x79.jpg 150w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01-300x157.jpg 300w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01-768x402.jpg 768w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01-1024x536.jpg 1024w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01-520x272.jpg 520w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><p id=\"caption-attachment-42182\" class=\"wp-caption-text\">Important Linux Commands With Syntax &#8211; Part 5<\/p><\/div>\n<h2>2. Important Linux Commands<\/h2>\n<p>Here, we are going to discuss a list of Important Linux Commands:<\/p>\n<h3>2.1. history<\/h3>\n<p><strong style=\"font-size: 16px\">a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ history<\/pre>\n<p>History of all the work done on the terminal is stored on bash shell secretly.<\/p>\n<p><strong>b. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ history \u2013c<\/pre>\n<p>This command clears the history of commands from memory to show the list of command which have word cd from history<\/p>\n<p><strong>c. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ history | grep cd<\/pre>\n<p>This command shows the commands from history which have word cd<\/p>\n<p><strong>d. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ history | tail&lt;or head&gt;<\/pre>\n<p>This command shows last or first 10 commands in history<\/p>\n<p><strong>e. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ ~\/.bash_history<\/pre>\n<p>This command shows the path where the bash of history is residing in memory. It is a dotfile.<\/p>\n<p><strong>f. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ echo &gt; ~\/. bash_history<\/pre>\n<p>This command will delete the history from the file.<\/p>\n<h3>2.2. clear<\/h3>\n<p><strong style=\"font-size: 16px\">a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ clear<\/pre>\n<p>It will clear the command prompt but not erase everything. You can get the previous commands by scrolling upwards<\/p>\n<h3>2.3. logout,exit<\/h3>\n<p><strong style=\"font-size: 16px\">a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ exit<\/pre>\n<p>This command will quit the current session.<\/p>\n<h3>2.4. sudo<\/h3>\n<p><strong>a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ mkdir \/directory-name # permission denied\r\n$ sudo mkdir \/directory-name # permission granted\r\n$ sudo rmdir \/directory-name # permission granted<\/pre>\n<p>sudo is a user which acts like a root, eg if u want to create any directory in root so you will be denied. But if you use sudo command, you will be asked for a password to create a directory in root. You can also get the permission to remove the directory<\/p>\n<h3>2.5. su<\/h3>\n<p><strong>a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ su &lt;username&gt;<\/pre>\n<p>This command switches the user in the terminal for e.g to change to the user &lt;username&gt;<\/p>\n<h3>2.6. wc<\/h3>\n<p><strong>a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ cat file.txt | wc \u2013l<\/pre>\n<p>This command returns the number of lines in the file<\/p>\n<p><strong>b. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ cat file.txt | wc -w<\/pre>\n<p>This command returns the number of words in the file<\/p>\n<p><strong>c. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ cat file.txt | wc -c<\/pre>\n<p>This command returns the number of characters in the file<\/p>\n<h3>2.7. sort<\/h3>\n<p><strong>a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ sort filr.txt<\/pre>\n<p>This command sorts the file column-wise, it first sorts the first column and the corresponding value of other columns will be also the same.<\/p>\n<p><strong>b. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ sort -n file.txt<\/pre>\n<p>This command is used for numeric sort<\/p>\n<p><strong>c. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ sort -r file.txt<\/pre>\n<p>This command is used for reverse sort<\/p>\n<p><strong>d. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ sort -kn,m file.txt<\/pre>\n<p>eg:- $ sort -k2,2n file.txt<\/p>\n<p>This command sorts file by column range; n is starting range, m is ending range and second n stands for numeric sort<\/p>\n<p><strong>e. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ sort -u file.txt<\/pre>\n<p>This command uniquely sorts the file<\/p>\n<h3>2.8. date<\/h3>\n<p><strong style=\"font-size: 16px\">a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ date<\/pre>\n<p>This command prints the date<\/p>\n<p><strong>b. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ date \"+%m\/%y\/%d\"<\/pre>\n<p>This command prints the date is the specified format<\/p>\n<p><strong>c. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ date \"+%s\"<\/pre>\n<p>This command prints the date in seconds<\/p>\n<h3>2.9. cal<\/h3>\n<p><strong style=\"font-size: 16px\">a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ cal<\/pre>\n<p>This command prints the calendar of the current month<\/p>\n<p><strong>b. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ cal \u2013y<\/pre>\n<p>This command prints the calendar for the whole year<\/p>\n<p><strong>c. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ cal 12 2009<\/pre>\n<p>This command prints the calendar for December 2009<\/p>\n<h3>2.10. gzip<\/h3>\n<p><strong style=\"font-size: 16px\">a. Usage:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"null\">$ gzip file<\/pre>\n<p>Using this command, original file will be compressed in zip format and it will disappear leaving behind .gz<\/p>\n<p>So, this was all about Important Linux Commands with syntax. Hope you like our explanation.<\/p>\n<p>Furthermore, if you have any query, feel free to ask in the comment box.<\/p>\n<p><strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/List_of_Unix_commands\">Reference<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. Important Linux Commands In this tutorial, you will learn important Linux commands that are required to become a Linux expert and would help you in learning Linux programming. These are some of the&#46;&#46;&#46;<\/p>\n","protected":false},"author":5,"featured_media":42182,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[2695,4961,6634,8155,8304,15221],"class_list":["post-1531","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","tag-common-linux-commands","tag-frequently-used-linux-commands","tag-important-linux-commands","tag-learn-linux-commands","tag-linux-commands","tag-useful-linux-commands"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Important Linux Commands With Syntax - Part 5 - DataFlair<\/title>\n<meta name=\"description\" content=\"Important Linux commands with syntax - learn basic Linux commands with syntax like history, sudo, clear, su, wc, exit, sort, date, cal, gzip\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/important-linux-commands\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Important Linux Commands With Syntax - Part 5 - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Important Linux commands with syntax - learn basic Linux commands with syntax like history, sudo, clear, su, wc, exit, sort, date, cal, gzip\" \/>\n<meta property=\"og:url\" content=\"https:\/\/data-flair.training\/blogs\/important-linux-commands\/\" \/>\n<meta property=\"og:site_name\" content=\"DataFlair\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataFlairWS\/\" \/>\n<meta property=\"article:published_time\" content=\"2017-01-27T09:44:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-11-15T09:17:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"DataFlair Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:site\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"DataFlair Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Important Linux Commands With Syntax - Part 5 - DataFlair","description":"Important Linux commands with syntax - learn basic Linux commands with syntax like history, sudo, clear, su, wc, exit, sort, date, cal, gzip","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/data-flair.training\/blogs\/important-linux-commands\/","og_locale":"en_US","og_type":"article","og_title":"Important Linux Commands With Syntax - Part 5 - DataFlair","og_description":"Important Linux commands with syntax - learn basic Linux commands with syntax like history, sudo, clear, su, wc, exit, sort, date, cal, gzip","og_url":"https:\/\/data-flair.training\/blogs\/important-linux-commands\/","og_site_name":"DataFlair","article_publisher":"https:\/\/www.facebook.com\/DataFlairWS\/","article_published_time":"2017-01-27T09:44:07+00:00","article_modified_time":"2018-11-15T09:17:57+00:00","og_image":[{"width":1200,"height":628,"url":"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2017\/01\/Important-Linux-Commands-01.jpg","type":"image\/jpeg"}],"author":"DataFlair Team","twitter_card":"summary_large_image","twitter_creator":"@DataFlairWS","twitter_site":"@DataFlairWS","twitter_misc":{"Written by":"DataFlair Team","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/data-flair.training\/blogs\/important-linux-commands\/#article","isPartOf":{"@id":"https:\/\/data-flair.training\/blogs\/important-linux-commands\/"},"author":{"name":"DataFlair Team","@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/person\/7f83c342f5d1632d6f7b4b0b0f447823"},"headline":"Important Linux Commands With Syntax &#8211; 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