{"id":3859,"date":"2025-12-15T10:39:22","date_gmt":"2025-12-15T10:39:22","guid":{"rendered":"https:\/\/www.hostitsmart.com\/manage\/knowledgebase\/?p=3859"},"modified":"2025-12-15T10:39:23","modified_gmt":"2025-12-15T10:39:23","slug":"kill-process-in-linux","status":"publish","type":"post","link":"https:\/\/www.hostitsmart.com\/manage\/knowledgebase\/486\/kill-process-in-linux.html","title":{"rendered":"How to Kill a Process in Linux?"},"content":{"rendered":"\n<p>Imagine you are working on your Linux server, and suddenly an application freezes, refuses to close, or starts using way too much CPU or memory. No matter how many times you click \u201cclose,\u201d it just won\u2019t listen.<\/p>\n\n\n\n<p>This happens to everyone, even experienced Linux users!<\/p>\n\n\n\n<p>The good news is that Linux gives you powerful commands to find and kill such processes instantly.<\/p>\n\n\n\n<p>In this guide, we will walk you through simple, clear steps to safely kill a process in Linux using various commands, keeping your server smooth and responsive.<\/p>\n\n\n\n<p>Let\u2019s get started!<\/p>\n\n\n\n<hr><p><strong>Also Read: <a href=\"https:\/\/www.hostitsmart.com\/manage\/knowledgebase\/483\/check-cpu-usage-in-linux.html\">How to Check CPU Usage in Linux?<\/a><\/strong><\/p><hr>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is a Process in Linux?<\/strong><\/h2>\n\n\n\n<p>A process is simply a program that is currently running on your server. Every process has a PID (Process ID) \u2014 a unique number that helps Linux identify it.<\/p>\n\n\n\n<p>To kill a process, we mainly use its PID.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>When Should You Kill a Process?<\/strong><\/h2>\n\n\n\n<p>You should only kill a process when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It is frozen or not responding.<\/li>\n\n\n\n<li>It is consuming too much CPU or memory<\/li>\n\n\n\n<li>It is causing a server slowdown<\/li>\n\n\n\n<li>You want to restart or stop a service manually.<\/li>\n\n\n\n<li>A program has hung or crashed<\/li>\n<\/ul>\n\n\n\n<hr><p><strong>Also Read: <a href=\"https:\/\/www.hostitsmart.com\/manage\/knowledgebase\/484\/check-memory-usage-in-linux.html\">How to Check Memory in Linux?<\/a><\/strong><\/p><hr>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Steps to Kill a Process in Linux<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u27a2 <strong>Step 1: Check Running Processes<\/strong><\/h3>\n\n\n\n<p>Before killing anything, you need to know what\u2019s running. Linux provides several commands to view active processes.<\/p>\n\n\n\n<p><strong>1. Using the ps command<\/strong><\/p>\n\n\n\n<p>\u2794 The <span class=\"code_syntax\">ps<\/span> command shows the currently running processes in your terminal session:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>ps<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>To see all server processes with detailed information, use the following command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>ps aux<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>a \u2013 It shows processes from all users<\/p>\n\n\n\n<p>u \u2013 It displays detailed info like CPU and memory usage<\/p>\n\n\n\n<p>x \u2013 It includes processes not attached to a terminal<\/p>\n\n\n\n<p>You will see a list with columns like <strong>USER, PID, CPU%, MEM%<\/strong>, and <strong>COMMAND<\/strong>.<\/p>\n\n\n\n<p><strong>2. Using the <span class=\"code_syntax\">top<\/span> command<\/strong><\/p>\n\n\n\n<p>\u2794 The <span class=\"code_syntax\">top<\/span> command shows a live, real-time view of all processes:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>top<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u2794 In this, you can scroll, sort, and watch activity change in real time.<\/p>\n\n\n\n<p><strong>3. Using the <span class=\"code_syntax\">htop<\/span> command (if installed)<\/strong><\/p>\n\n\n\n<p>\u2794 The <span class=\"code_syntax\">htop<\/span> command is a more user-friendly, colorful version of <strong>top<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>htop<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>You can kill a process directly by selecting it and pressing F9.<\/p>\n\n\n\n<hr><p><strong>Also Read: <\/strong><a href=\"https:\/\/www.hostitsmart.com\/manage\/knowledgebase\/481\/check-os-version-in-linux.html\"><strong>How to Check OS Version in Linux\u200b?<\/strong><\/a><\/p><hr>\n\n\n\n<h3 class=\"wp-block-heading\">\u27a2 <strong>Step 2: Find the Process You Want to Kill<\/strong><\/h3>\n\n\n\n<p>Once you have the list of running processes, search for the process by its name or check its resource usage.<\/p>\n\n\n\n<p>\u27a2 <strong>Find a process by name using <span class=\"code_syntax\">pgrep<\/span><\/strong><\/p>\n\n\n\n<p>\u2794 If you know the process name (like Apache, nginx, Firefox, etc.), you can use this command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>pgrep processname<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>For Example:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>pgrep firefox<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This will show the PID(s) for that process.<\/p>\n\n\n\n<p>\u27a2 <strong>Search using ps and grep<\/strong><\/p>\n\n\n\n<p>\u2794 If you want to search from the process list manually:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>ps aux | grep processname<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>For Example:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>ps aux | grep nginx<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u27a2 <strong>Step 3: Kill a Process Using the kill Command<\/strong><\/h3>\n\n\n\n<p>\u2794 Once you have the PID, the quickest method is to use the <strong><span class=\"code_syntax\">kill<\/span><\/strong> command.<\/p>\n\n\n\n<p><strong>1. Kill a process normally<\/strong><\/p>\n\n\n\n<p>\u2794 To kill a process normally, you have to use the following command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>kill PID<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Example:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>kill 1450<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This sends a safe termination signal (SIGTERM), allowing the process to close gracefully.<\/p>\n\n\n\n<p><strong>2. Force kill a process<\/strong><\/p>\n\n\n\n<p>If a process refuses to stop, you have to use:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>kill -9 PID<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>-9<\/strong> is <strong>SIGKILL<\/strong>, a powerful force-stop signal.<\/li>\n\n\n\n<li>The process stops immediately without cleanup.<\/li>\n<\/ul>\n\n\n\n<p><strong>Example:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>kill -9 1450<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Use this only when a normal kill doesn\u2019t work.<\/p>\n\n\n\n<p><strong>3. Kill a Process by Name Using <span class=\"code_syntax\">pkill<\/span><\/strong><\/p>\n\n\n\n<p>Instead of searching for the PID, you can kill a process directly by its name.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>pkill processname<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>For Example:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>pkill firefox<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This will kill all processes with the given name.<\/p>\n\n\n\n<p><strong>4. Kill All Processes of a User<\/strong><\/p>\n\n\n\n<p>If you want to stop all processes belonging to a particular user, you have to use the following command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>pkill -u username<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>For Example:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>pkill -u john<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This is useful for managing logged-in accounts or cleaning up zombie processes.<\/p>\n\n\n\n<p><strong>5. Kill a Process from the <span class=\"code_syntax\">top<\/span> Command\u00a0<\/strong><\/p>\n\n\n\n<p>Inside the <span class=\"code_syntax\">top <\/span>command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><button class=\"copy-btn\" onclick=\"copyCommand(this)\">\ud83d\udccb<\/button><span class=\"copy-msg\">Copied!<\/span>\n  <table class=\"has-fixed-layout\"><tbody><tr><td class=\"kb_firewall\"><strong>top<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Press <strong>k<\/strong> (for kill)<\/li>\n\n\n\n<li>Enter the <strong>PID<\/strong><\/li>\n\n\n\n<li>Press Enter to kill<\/li>\n<\/ul>\n\n\n\n<p>This is a quick method if you are already monitoring performance in real-time.<\/p>\n\n\n\n<hr><p><strong>Also Read: <\/strong><a href=\"https:\/\/www.hostitsmart.com\/manage\/knowledgebase\/482\/check-os-kernel-version-in-linux.html\"><strong>How to Check OS Kernel Version in Linux\u200b?<\/strong><\/a><\/p><hr>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Common Kill Signals Explained<\/strong><\/h2>\n\n\n\n<table style=\"border-collapse: collapse; width: 100%;\" border=\"1\">\n  <thead>\n    <tr style=\"height: 18px;\">\n      <th style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>Signal<\/strong><\/span><\/p><\/th>\n      <th style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>Number<\/strong><\/span><\/p><\/th>\n      <th style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>Description<\/strong><\/span><\/p><\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr style=\"height: 18px;\">\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>SIGTERM<\/strong><\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">15<\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">Safe, polite request to close (default)<\/span><\/p><\/td>\n    <\/tr>\n    <tr style=\"height: 18px;\">\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>SIGKILL<\/strong><\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">9<\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">Forced kill, cannot be ignored<\/span><\/p><\/td>\n    <\/tr>\n    <tr style=\"height: 18px;\">\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>SIGSTOP<\/strong><\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">19<\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">Pause\/stop a process<\/span><\/p><\/td>\n    <\/tr>\n    <tr style=\"height: 18px;\">\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\"><strong>SIGCONT<\/strong><\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">18<\/span><\/p><\/td>\n      <td style=\"padding: 5px 10px; width: 33.3333%; height: 18px; text-align: center;\"><p><span style=\"font-weight: 400; font-family: verdana, geneva, sans-serif;\">Resume a stopped process<\/span><\/p><\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n\n\n\n<p>You rarely need more than <strong>SIGTERM<\/strong> and <strong>SIGKILL<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p>Killing a process in Linux is simple once you understand how processes work and how to find their PID. Whether it\u2019s a frozen application or a misbehaving service, Linux gives you complete control through commands like <strong><span class=\"code_syntax\">kill, pkill, top,<\/span> and <span class=\"code_syntax\">pgrep<\/span><\/strong>.<\/p>\n\n\n\n<p>By following the steps in this guide, you can quickly identify and stop any unwanted processes, keeping your server stable and efficient.<\/p>\n\n\n\n<p>If you are managing a server, knowing these commands will save you a lot of time and frustration.<\/p>\n\n\n\n<p>Happy Linux-ing!<\/p>\n\n\n<script>\nfunction copyCommand(btn) {\n  const td = btn.parentElement.querySelector(\"td.kb_firewall\");\n  const text = td.innerText.trim();\n\n  navigator.clipboard.writeText(text).then(() => {\n    const msg = btn.parentElement.querySelector(\".copy-msg\");\n    msg.style.display = \"inline-block\";\n    setTimeout(() => msg.style.display = \"none\", 1000);\n  });\n}\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Imagine you are working on your Linux server, and suddenly an application freezes, refuses to close, or starts using way too much CPU or memory. No matter how many times you click \u201cclose,\u201d it just won\u2019t listen. This happens to everyone, even experienced Linux users! The good news is that Linux gives you powerful commands [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-3859","post","type-post","status-publish","format-standard","hentry","category-vps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Kill a Process in Linux?<\/title>\n<meta name=\"description\" content=\"Learn how to kill a process in Linux using simple and effective commands with our step-by-step guide, which explains different methods to help you manage server processes easily.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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