{"id":3953,"date":"2014-07-16T14:27:43","date_gmt":"2014-07-16T19:27:43","guid":{"rendered":"https:\/\/secure.rosehosting.com\/blog\/?p=3953"},"modified":"2022-12-07T09:33:30","modified_gmt":"2022-12-07T15:33:30","slug":"5-linux-network-troubleshooting-and-configuration-commands","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/","title":{"rendered":"5 Linux Network Troubleshooting and Configuration Commands"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p><img decoding=\"async\" class=\"size-full wp-image-24637 alignright\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/Linux-Network-Troubleshooting-and-Configuration-Commands.png\" alt=\"Linux Network Troubleshooting and Configuration Commands\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/Linux-Network-Troubleshooting-and-Configuration-Commands.png 300w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/Linux-Network-Troubleshooting-and-Configuration-Commands-150x113.png 150w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/Linux-Network-Troubleshooting-and-Configuration-Commands-200x150.png 200w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/Linux-Network-Troubleshooting-and-Configuration-Commands-50x38.png 50w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>Computers are usually connected in networks which are groups of computer systems and other computing hardware devices that are linked together through communication channels so they can facilitate communication and resource-sharing among a wide range of users.<\/p>\r\n<p>This article explains some of the most frequently used network configuration and troubleshooting commands in Linux. They are various tools which can be useful when networking with other computers both within the local network and across the Internet, obtaining more information about other computers. All these commands should be entered at the command prompt in your Linux VPS and you must press the ENTER button to execute the desired command. Please note that all Linux commands are case sensitive.<\/p>\r\n<p><!--more--><\/p>\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-662dddc99a0d2\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662dddc99a0d2\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#5-Most-Used-Linux-Network-Troubleshooting-and-Configuration-Commands\" title=\"5 Most Used Linux Network Troubleshooting and Configuration Commands\">5 Most Used Linux Network Troubleshooting and Configuration Commands<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#1-PING-Command-in-Linux\" title=\"1. PING Command in\u00a0 Linux\">1. PING Command in\u00a0 Linux<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#2-IFCONFIG-command-in-Linux\" title=\"2. IFCONFIG command in Linux\">2. IFCONFIG command in Linux<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#3-TRACEROUTE-Command-in-Linux\" title=\"3. TRACEROUTE Command in Linux\">3. TRACEROUTE Command in Linux<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#4-DIG-Command-in-Linux\" title=\"4. DIG Command in Linux\">4. DIG Command in Linux<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#5-NETSTAT-Command-in-Linux\" title=\"5. NETSTAT Command in Linux\">5. NETSTAT Command in Linux<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"5-Most-Used-Linux-Network-Troubleshooting-and-Configuration-Commands\"><\/span>5 Most Used Linux Network Troubleshooting and Configuration Commands<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Login to your Linux virtual private server using SSH<\/p>\r\n<pre>ssh username@hostname<\/pre>\r\n<h2><span class=\"ez-toc-section\" id=\"1-PING-Command-in-Linux\"><\/span>1. PING Command in\u00a0 Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Using the &#8220;ping&#8221; command is the best way to test connectivity between a source computer and a specified destination computer. Ping uses ICMP (Internet Control Message Protocol) to communicate to other devices.<\/p>\r\n<p>Usage:<\/p>\r\n<pre>ping yourdomain.com<\/pre>\r\n<p>Example:<\/p>\r\n<pre>ping rosehosting.com<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3955\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ping.png\" alt=\"ping\" width=\"350\" height=\"76\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ping.png 585w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ping-300x65.png 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<p>In Linux the ping command keeps executing until you interrupt it using Control+C from the keyboard. If you want to exit after N number of requests (success or error responses) you need to use the -c option.<\/p>\r\n<pre>ping -c 6 rosehosting.com<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3959\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/pingr.png\" alt=\"pingr\" width=\"350\" height=\"108\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/pingr.png 572w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/pingr-300x92.png 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"2-IFCONFIG-command-in-Linux\"><\/span>2. IFCONFIG command in Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>The \u201cifconfig\u201d command is used for displaying current network configuration information. You can also set up an IP address, netmask or broadcast address to a network interface. With this command you can view IP addresses and assign a Hardware \/ MAC address to interface.<\/p>\r\n<p>The MTU and Metric fields show the current MTU and metric values for that interface.The <tt class=\"LITERAL\">RX<\/tt> and <tt class=\"LITERAL\">TX<\/tt> lines show how many packets have been received or transmitted error free, how many errors occurred, how many packets were dropped (probably because of low memory), and how many were lost because of an overrun.<\/p>\r\n<pre>ifconfig<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3960\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ifconfig.png\" alt=\"ifconfig\" width=\"350\" height=\"281\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ifconfig.png 525w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ifconfig-300x241.png 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<p>If you want to see a specific network interface like for example eth0 you need to enter:<\/p>\r\n<pre>ifconfig eth0<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3961\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ifconfigeth0.png\" alt=\"ifconfigeth0\" width=\"350\" height=\"88\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ifconfigeth0.png 530w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/ifconfigeth0-300x75.png 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"3-TRACEROUTE-Command-in-Linux\"><\/span>3. TRACEROUTE Command in Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Traceroute is a network troubleshooting utility which shows the number of hops taken to reach a destination. It also determines the packets traveling path.<\/p>\r\n<p>Usage:<\/p>\r\n<pre>traceroute yourdomain.com<\/pre>\r\n<p>Example:<\/p>\r\n<pre>traceroute google.com<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3962\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/traceroute.png\" alt=\"traceroute\" width=\"350\" height=\"114\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/traceroute.png 584w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/traceroute-300x98.png 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"4-DIG-Command-in-Linux\"><\/span>4. DIG Command in Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Domain information groper is a network administration command-line tool for querying Domain Name System (DNS) servers for information about host addresses, mail exchanges, name servers, and related information.<br \/>This tool can be used from any Linux (Unix) or Macintosh OS X operating system. Usually the most typical use of dig is to simply query a single host.<\/p>\r\n<p>Usage:<\/p>\r\n<pre>dig yourdomain.com<\/pre>\r\n<p>Example:<\/p>\r\n<pre>dig google.com<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3963\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/dig.png\" alt=\"dig\" width=\"350\" height=\"436\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/dig.png 499w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/dig-240x300.png 240w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<p>If you want to query the MX records for google.com enter the following command:<\/p>\r\n<pre>dig MX google.com<\/pre>\r\n<p>The information that we need is in the Answer Section.<\/p>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3964\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/digmx.png\" alt=\"digmx\" width=\"350\" height=\"372\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/digmx.png 537w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/digmx-282x300.png 282w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"5-NETSTAT-Command-in-Linux\"><\/span>5. NETSTAT Command in Linux<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>is a command-line tool that displays network connections (both incoming and outgoing), routing tables, and a number of network interfaces (network interface controller or software-defined network interface).<\/p>\r\n<p>For example :<\/p>\r\n<pre>netstat -anlp<\/pre>\r\n<p>Gives us the following output:<\/p>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3970\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/rsz_netstat.png\" alt=\"netstat\" width=\"350\" height=\"385\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/rsz_netstat.png 829w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/rsz_netstat-272x300.png 272w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/rsz_netstat-600x660.png 600w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<p>Now we can see all active connections and the TCP and UDP ports on which the computer is listening.<\/p>\r\n<p>To displays routing table information use option -r.<\/p>\r\n<p>For example:<\/p>\r\n<pre>netstat -r<\/pre>\r\n<p><img decoding=\"async\" class=\"alignnone wp-image-3966\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/netstatr.png\" alt=\"netstatr\" width=\"350\" height=\"61\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/netstatr.png 556w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2014\/07\/netstatr-300x52.png 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\r\n<p>Of course this is only a glimpse of the possible network commands usage. You can learn the command line and work with these network command tools if you use one of our Linux VPS <a href=\"https:\/\/www.rosehosting.com\">Hosting services.<\/a> You can always contact our admins if you encounter a problem in managing your server. They are available 24\u00d77 and will take care of your request immediately.<\/p>\r\n<p><strong><span style=\"color: #ff0000;\">PS<\/span>.<\/strong> If you liked this post please share it with your friends on the social networks using the buttons on the left or simply leave a reply below. Thanks.<\/p>\r\n\r\n<p>&nbsp;<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Computers are usually connected in networks which are groups of computer systems and other computing hardware devices that are linked &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"5 Linux Network Troubleshooting and Configuration Commands\" class=\"read-more button\" href=\"https:\/\/www.rosehosting.com\/blog\/5-linux-network-troubleshooting-and-configuration-commands\/#more-3953\" aria-label=\"Read more about 5 Linux Network Troubleshooting and Configuration Commands\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":24637,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1701,21],"tags":[924,923],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>5 Linux Network Troubleshooting and Configuration 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