{"id":2322,"date":"2023-01-28T09:22:37","date_gmt":"2023-01-28T03:52:37","guid":{"rendered":"https:\/\/trysiteprice.com\/blog\/?p=2322"},"modified":"2023-01-28T09:22:37","modified_gmt":"2023-01-28T03:52:37","slug":"bash-check-if-process-is-running-or-not-on-linux-unix","status":"publish","type":"post","link":"https:\/\/trysiteprice.com\/blog\/bash-check-if-process-is-running-or-not-on-linux-unix\/","title":{"rendered":"Bash check if process is running or not on Linux \/ Unix"},"content":{"rendered":"<p>You can use the <code>ps<\/code> command to check if a process is running or not on Linux\/Unix. The <code>ps<\/code> command lists all running processes on the system.<\/p>\n<p>To check if a specific process is running, you can use the <code>grep<\/code> command to filter the output of the <code>ps<\/code> command.<\/p>\n<p>For example, to check if the process &#8220;nginx&#8221; is running, you can use the following command:<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-perl\">ps aux | <span class=\"hljs-keyword\">grep<\/span> -E <span class=\"hljs-string\">'[n]ginx'<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>This command lists all processes and then filters the output to show only the lines that contain the string &#8220;nginx&#8221;. The <code>-E<\/code> option is used for extended regular expressions and the <code>[n]<\/code> tells grep to match the character &#8216;n&#8217; at the beginning of the process name, it&#8217;s used to avoid matching the grep process itself.<\/p>\n<p>You can also use the <code>pgrep<\/code> command to check if a process is running or not. The <code>pgrep<\/code> command takes the process name as an argument and returns the process ID (PID) if the process is running.<\/p>\n<p>For example, to check if the process &#8220;nginx&#8221; is running, you can use the following command:<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs\">pgrep nginx<br \/>\n<\/code><\/div>\n<\/div>\n<p>If the process is running, the command will return the PID of the process. If the process is not running, the command will return nothing.<\/p>\n<p>You can also use <code>systemctl<\/code> command to check whether a service is running or not.<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-lua\">systemctl <span class=\"hljs-built_in\">status<\/span> nginx<br \/>\n<\/code><\/div>\n<\/div>\n<p>This command will show the status of the service and it will be active (running) or inactive (dead)<\/p>\n<p>You can also check the return code of the command, it will be 0 if process is running and non-zero if the process is not running.<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-bash\">pgrep nginx || <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"Process not running\"<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>or<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-bash\"><span class=\"hljs-keyword\">if<\/span> pgrep nginx &gt; \/dev\/null; <span class=\"hljs-keyword\">then<\/span> <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"Process is running\"<\/span>; <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"Process is not running\"<\/span>; <span class=\"hljs-keyword\">fi<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>These are some examples of how you can check if a process is running or not on Linux\/Unix using the command-line.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You can use the ps command to check if a process is running or not on Linux\/Unix. The ps command lists all running processes on the system. To check if a specific process is running, you can use the grep command to filter the output of the ps command. For example, to check if the &#8230; <a title=\"Bash check if process is running or not on Linux \/ Unix\" class=\"read-more\" href=\"https:\/\/trysiteprice.com\/blog\/bash-check-if-process-is-running-or-not-on-linux-unix\/\" aria-label=\"Read more about Bash check if process is running or not on Linux \/ Unix\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2322","post","type-post","status-publish","format-standard","hentry","category-best-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bash check if process is running or not on Linux \/ Unix - TrySitePrice<\/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:\/\/trysiteprice.com\/blog\/bash-check-if-process-is-running-or-not-on-linux-unix\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bash check if process is running or not on Linux \/ Unix - TrySitePrice\" \/>\n<meta property=\"og:description\" content=\"You can use the ps command to check if a process is running or not on Linux\/Unix. The ps command lists all running processes on the system. To check if a specific process is running, you can use the grep command to filter the output of the ps command. For example, to check if the ... 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