{"id":50493,"date":"2025-01-27T13:44:18","date_gmt":"2025-01-27T13:44:18","guid":{"rendered":"https:\/\/accuweb.cloud\/resource\/?post_type=faq&#038;p=50493"},"modified":"2026-02-17T13:28:09","modified_gmt":"2026-02-17T13:28:09","slug":"nessus-for-vulnerability-scanning-on-ubuntu","status":"publish","type":"faq","link":"https:\/\/accuweb.cloud\/resource\/articles\/nessus-for-vulnerability-scanning-on-ubuntu","title":{"rendered":"What are the steps to utilize Nessus for vulnerability scanning on Ubuntu?"},"content":{"rendered":"<h2 class=\"ack-h2\">What are the steps to utilize Nessus for vulnerability scanning on Ubuntu?<\/h2>\n<p>Nessus is a vulnerability scanning tool created by Tenable Inc. It\u2019s a subscription-based tool that scans all ports on a computer or server for known vulnerabilities and exploits, providing reports in various formats.<\/p>\n<p>Nessus uses an up-to-date <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/database\" target=\"_blank\" rel=\"noopener\">database<\/a> of vulnerabilities to identify potential security issues. It&#8217;s user-friendly and doesn\u2019t require advanced knowledge of operating systems or command-line tools, making it a great tool for the reconnaissance stage of a security penetration test.<\/p>\n<div class=\"table-of-content\">\n<h2>Table of Contents<\/h2>\n<ul class=\"ack-ul\">\n<li><a class=\"ack-link-color ajax_link\" href=\"#Prerequisites\">Prerequisites<\/a><\/li>\n<li><a class=\"ack-link-color ajax_link\" href=\"#Installing-the-Nessus-Essentials-Tool\">Installing the Nessus Essentials Tool<\/a><\/li>\n<li><a class=\"ack-link-color ajax_link\" href=\"#Setting-Up-Nessus-in-Local-Browser\">Setting Up Nessus in a Local Browser<\/a><\/li>\n<li><a class=\"ack-link-color ajax_link\" href=\"#Configuring-Nessus-Scan-Settings\">Configuring Nessus Scan Settings to Run a Vulnerability Scan<\/a><\/li>\n<li><a class=\"ack-link-color ajax_link\" href=\"#Performing-Vulnerability-Scan-with-Nessus\">Performing a Vulnerability Scan with Nessus<\/a><\/li>\n<li><a class=\"ack-link-color ajax_link\" href=\"#Reviewing-Scan-Results\">Reviewing the Scan Results<\/a><\/li>\n<li><a class=\"ack-link-color ajax_link\" href=\"#Conclusion\">Conclusion<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Nessus comes in three versions:<\/p>\n<p><b>Nessus Essentials:<\/b>\u00a0A free version with basic tools for regular vulnerability scans.<\/p>\n<p><b>Nessus Professional:<\/b>\u00a0Offers more features than the Essentials version, suitable for professional penetration testers and <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/resource\/user-guide\/cloud-security-report\" target=\"_blank\" rel=\"noopener\">security<\/a> experts.<\/p>\n<p><b>Nessus Expert:<\/b>\u00a0The most comprehensive version, ideal for small IT departments and enterprises.<br \/>\n<strong id=\"Prerequisites\"><\/strong><br \/>\nFor this demonstration, we&#8217;ll use the Nessus Essentials version. The installation process is similar for all versions.<\/p>\n<h2 class=\"ack-h2\">Prerequisites<\/h2>\n<p>Before starting this tutorial, make sure you have the following:<\/p>\n<p>&#8211; A server or virtual machine running Ubuntu 22.04 (either the Desktop or Server version).<\/p>\n<p>&#8211; At least 4 GB of RAM on the machine (though 8 GB is recommended for larger scans).<\/p>\n<p>&#8211; A minimum of 5 GB of free space on the Ubuntu machine for installing Nessus Essentials.<\/p>\n<p>&#8211; The machine should have at least a dual-core processor (4 cores minimum). More cores will speed up the scanning process.<\/p>\n<p>&#8211; The processor should have a speed of 1 GHz or higher.<\/p>\n<p>&#8211; (Optional) Another machine to perform the vulnerability scan on. This target machine should also run Ubuntu, have a non-root user account, and access to the root account if needed.<\/p>\n<p>&#8211; A supported web browser (like Google Chrome or Mozilla Firefox). This tutorial uses Mozilla Firefox.<br \/>\n<strong id=\"Installing-the-Nessus-Essentials-Tool\"><\/strong><br \/>\nNow, let&#8217;s move on to the installation part of this tutorial.<\/p>\n<h2 class=\"ack-h2\">Installing the Nessus Essentials Tool<\/h2>\n<p>Follow these steps to install Nessus Essentials on your Ubuntu machine:<\/p>\n<p><b>Step 1:<\/b>\u00a0Download the Nessus Installation Package. Use the following curl command to download the Nessus installation package for Ubuntu:<\/p>\n<pre><code class=\"language-javascript\"><b># curl --request GET --url 'https:\/\/www.tenable.com\/downloads\/api\/v2\/pages\/nessus\/files\/Nessus-10.4.2-ubuntu1404_amd64.deb' --output \/tmp\/'Nessus-10.4.2-ubuntu1404_amd64.deb'<\/b><\/code><\/pre>\n<p>This will download the Nessus installation file to the \/tmp folder.<\/p>\n<div class=\"cta-btn-top-space ack-extra-image-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"article-space\"><\/div>\n<p><b>Step 2:\u00a0<\/b>Use the dpkg command to install Nessus.<\/p>\n<pre><code class=\"language-javascript\"><b># dpkg -i \/tmp\/Nessus-10.4.2-ubuntu1404_amd64.deb<\/b><\/code><\/pre>\n<p><b>Step 3:<\/b>\u00a0After the installation, start the Nessus service with this command:<\/p>\n<pre><code class=\"language-javascript\"><b># \/bin\/systemctl start nessusd.service<\/b><\/code><\/pre>\n<p><b>Step 4:\u00a0<\/b>Open your browser and go to:<\/p>\n<p><b>http:\/\/localhost:8834\/<\/b><\/p>\n<div class=\"ack-formula\"><b>Note:<\/b>\u00a0Port 8834 is the default port for Nessus.<\/div>\n<div class=\"article-space\"><\/div>\n<p><b id=\"Setting-Up-Nessus-in-Local-Browser\">Step 5:<\/b>\u00a0If you see a security warning, click on &#8220;Advanced&#8221; and then &#8220;Continue&#8221; to access the Nessus interface. It&#8217;s safe to proceed.<\/p>\n<h2 class=\"ack-h2\">Setting Up Nessus in a Local Browser<\/h2>\n<p>Follow these steps to set up Nessus in your browser:<\/p>\n<p><b>Step 1:\u00a0<\/b>Go to http:\/\/localhost:8834\/ in your web browser to access the Nessus interface.<\/p>\n<p><b>Step 2:<\/b>\u00a0On the Welcome screen, click on Nessus Essentials to continue with the free version.<\/p>\n<p>If you have a subscription to Nessus Professional or Nessus Expert, you can select those options instead.<\/p>\n<p><b>Step 3:<\/b>\u00a0Enter your Name and Email address to receive an activation code for Nessus Essentials.<\/p>\n<p>If you already have an activation code, skip this step.<\/p>\n<p><b>Step 4:\u00a0<\/b>Check your email for the activation code.<\/p>\n<p>Enter the code in the activation field and continue.<\/p>\n<p><b>Step 5:<\/b>\u00a0Choose a username (e.g., &#8220;Nick&#8221;) and create a strong password.<\/p>\n<p>This will be your admin account for Nessus.<\/p>\n<p><b>Step 6:<\/b> Next, install Necessary Plug-ins. Nessus will begin installing the required plug-ins.<\/p>\n<p>This process might take some time, depending on your internet speed and system <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/performance-new\" target=\"_blank\" rel=\"noopener\">performance<\/a>.<\/p>\n<p><b id=\"Configuring-Nessus-Scan-Settings\">Step 7:\u00a0<\/b>Once the plug-ins are installed and a confirmation message appears, you can proceed to use Nessus.<\/p>\n<h2 class=\"ack-h2\">Configuring Nessus Scan Settings to Run a Vulnerability Scan<\/h2>\n<p>Follow these steps to set up and run a vulnerability scan in Nessus:<\/p>\n<p><b>Step 1:<\/b>\u00a0Go to the My Scans folder on the Nessus homepage. If this is your first time using Nessus, there will be no existing scans.<\/p>\n<p><b>Step 2:<\/b>\u00a0Click the New Scan button in the top right corner of the dashboard.<\/p>\n<p><b>Step 3:\u00a0<\/b>On the Scan Template page, you&#8217;ll see three categories:<\/p>\n<p>&#8211; Discovery<\/p>\n<p>&#8211; Vulnerability<\/p>\n<p>&#8211; Compliance<\/p>\n<p>Choose the Vulnerability category and select Basic Network Scan.<\/p>\n<div class=\"cta-btn-top-space ack-extra-image-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"article-space\"><\/div>\n<p><b>Step 4:\u00a0<\/b>Configure Basic Settings:<\/p>\n<p><b>General:<\/b><\/p>\n<p>&#8211; Enter the target system\u2019s name and IP address.<\/p>\n<p>&#8211; Optionally, add a description and change the folder if needed.<\/p>\n<p><b>Schedule:<\/b><\/p>\n<p>&#8211; Leave the schedule off unless you need to set a specific time for the scan.<\/p>\n<p><b>Notifications:<\/b><\/p>\n<p>&#8211; Leave this empty if you don\u2019t need email notifications.<\/p>\n<p><b>Step 5:<\/b>\u00a0Set Discovery Scope:<\/p>\n<p>&#8211; Choose Common Ports to scan the most used ports for quicker results.<\/p>\n<p>&#8211; Options include:<\/p>\n<p>Common Ports (default)<\/p>\n<p>All Ports<\/p>\n<p>Custom Ports<\/p>\n<p><b>Step 6:<\/b>\u00a0Configure Assessment Settings:<\/p>\n<p>&#8211; Select Default to scan for basic vulnerabilities.<\/p>\n<p>&#8211; Other options include:<\/p>\n<p>Scan for known web vulnerabilities<\/p>\n<p>Scan for all web vulnerabilities (quick)<\/p>\n<p>Scan for all web vulnerabilities (complex)<\/p>\n<p>Custom<\/p>\n<p><b>Step 7:\u00a0<\/b>Customize Report Settings:<\/p>\n<p>&#8211; Under Processing, check:<\/p>\n<p>Show missing patches that have been superseded.<\/p>\n<p>Hide results from plugins initiated as a dependency.<\/p>\n<p>&#8211; In the Output Section, choose the format (HTML or XML) for the report.<\/p>\n<p><b>Step 8:\u00a0<\/b>Set Advanced Options (Optional):<\/p>\n<p>&#8211; Use Default settings for basic scans:<\/p>\n<p>Scans up to 30 hosts with a 5-second timeout.<\/p>\n<p>&#8211; For lower bandwidth networks, adjust settings to increase timeout and reduce the number of hosts scanned.<\/p>\n<p>By following these steps, you&#8217;ll be able to run a Basic Network Scan with minimal customization, perfect for initial vulnerability assessments.<br \/>\n<strong id=\"Performing-Vulnerability-Scan-with-Nessus\"><\/strong><\/p>\n<div class=\"cta-btn-top-space ack-extra-image-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"article-space\"><\/div>\n<h2 class=\"ack-h2\">Performing a Vulnerability Scan with Nessus<\/h2>\n<p>Follow these steps to run a basic vulnerability scan with Nessus:<\/p>\n<p><b>Step 1:\u00a0<\/b>Find the IP Address of the Target Machine.<\/p>\n<p>&#8211; On your second Ubuntu machine, open the terminal.<\/p>\n<p>&#8211; Type the following command to find the IP address:<\/p>\n<pre><code class=\"language-javascript\"><b># ip a | grep 'inet 192'<\/b><\/code><\/pre>\n<p>&#8211; Look for the IPv4 address ending in 192.xxx.xxx.xxx\/24. Note down the part before \/24, as this is your machine&#8217;s IP address.<\/p>\n<p><b>Step 2:\u00a0<\/b>Start a New Basic Network Scan.<\/p>\n<p>&#8211; On the machine with Nessus, open the Nessus interface.<\/p>\n<p>&#8211; Click New Scan and select Basic Network Scan.<\/p>\n<p><b>Step 3:\u00a0<\/b>Configure the Scan:<\/p>\n<p><b>Name:\u00a0<\/b>Enter a name for your scan.<\/p>\n<p><b>Description:\u00a0<\/b>Optionally, add a description.<\/p>\n<p><b>Folder:\u00a0<\/b>Leave it set to My Scans.<\/p>\n<p><b>Targets:\u00a0<\/b>Enter the IP address of your target machine.<\/p>\n<p><b>Step 4:\u00a0<\/b>Set Discovery Options:<\/p>\n<p>&#8211; In the Discovery section, select Port scan (standard ports) from the dropdown menu.<\/p>\n<p><b>Step 5:\u00a0<\/b>Set Assessment Options:<\/p>\n<p>&#8211; In the Assessment section, select Default from the dropdown menu.<\/p>\n<p><b>Step 6:\u00a0<\/b>Configure Report Settings:<\/p>\n<p>&#8211; In the Report section, leave all checkboxes at their default settings.<\/p>\n<p><b>Step 7:\u00a0<\/b>Set Advanced Options:<\/p>\n<p>In the Advanced section, keep the Scan Type set to Default.<\/p>\n<p><b>Step 8:<\/b>\u00a0Save and Start the Scan:<\/p>\n<p>&#8211; Click Save to save the scan configuration.<\/p>\n<p>&#8211; In the My Scans folder, click the Play\/Launch button next to your scan to start it.<\/p>\n<p><b id=\"Reviewing-Scan-Results\">Step 9:<\/b>\u00a0Review the Results:<\/p>\n<p>Once the scan is complete, proceed to the next section to review the results.<\/p>\n<h2 class=\"ack-h2\">Reviewing the Scan Results<\/h2>\n<p>Follow these steps to review your Nessus scan results:<\/p>\n<p><b>Step 1:\u00a0<\/b>Open the Scan Results:<\/p>\n<p>&#8211; After the scan is complete, click on the scan in the My Scans folder to view the results.<\/p>\n<p><b>Step 2:<\/b>\u00a0Generate an HTML Report:<\/p>\n<p>&#8211; Click the Report button in the top right corner.<\/p>\n<p>&#8211; A dialog box will appear. Select HTML as the report format.<\/p>\n<p>&#8211; Click Continue to download the report.<\/p>\n<p><b>Step 3:<\/b>\u00a0Access the Report:<\/p>\n<p>&#8211; The report will be saved in your downloads folder.<\/p>\n<p>&#8211; Open the report in your browser to view the results.<\/p>\n<p><b>Step 4:<\/b>\u00a0Understand the Results:<\/p>\n<p>The report will display the following categories of vulnerabilities:<\/p>\n<p><b>Critical:<\/b>\u00a0Serious vulnerabilities that are easily exploitable.<\/p>\n<p><b>High:\u00a0<\/b>Vulnerabilities that skilled hackers can exploit.<\/p>\n<p><b>Medium:\u00a0<\/b>Vulnerabilities that are harder to exploit but can be fixed with some effort.<\/p>\n<p><b>Low:<\/b>\u00a0Minor issues, often related to outdated patches, requiring high expertise to exploit.<\/p>\n<p><b id=\"Conclusion\">Info:\u00a0<\/b>General information about the machine, like hardware and operating system details.<\/p>\n<h2 class=\"ack-h2\">Conclusion<\/h2>\n<p>This guide explains how to install, set up, and use Nessus for vulnerability scanning. Nessus is a powerful tool, but it works best when set up correctly. Keep in mind that keeping your network and system secure requires more than just tools. For the best protection, combine automated tools with continuous learning and multiple layers of <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/resource\/user-guide\/cloud-security-report\" target=\"_blank\" rel=\"noopener\">security<\/a>.<\/p>\n<div class=\"cta-btn-top-space ack-extra-image-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"cta-btn-mob-space\"><\/div>\n","protected":false},"author":1,"featured_media":52879,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-50493","faq","type-faq","status-publish","has-post-thumbnail","hentry","faq_topics-kb","faq_topics-product-documentation","faq_topics-ubuntu","faq_topics-vulnerability-scanning-using-nessus"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.10 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Steps to Use Nessus for Vulnerability Scanning on Ubuntu<\/title>\n<meta name=\"description\" content=\"Follow these steps to install and configure Nessus for effective vulnerability scanning on your Ubuntu system.\" \/>\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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