{"id":2082,"date":"2023-01-27T11:04:57","date_gmt":"2023-01-27T05:34:57","guid":{"rendered":"https:\/\/trysiteprice.com\/blog\/?p=2082"},"modified":"2024-09-24T18:31:06","modified_gmt":"2024-09-24T13:01:06","slug":"ubuntu-configuring-ssh-key-based-authentication","status":"publish","type":"post","link":"https:\/\/trysiteprice.com\/blog\/ubuntu-configuring-ssh-key-based-authentication\/","title":{"rendered":"Ubuntu configuring SSH Key-based Authentication"},"content":{"rendered":"<p>SSH key-based authentication is a more secure way to log in to a remote server than using a password. It uses a pair of private and public keys to authenticate the user, rather than a password. In this way, only the user who has the private key can log in to the server.<\/p>\n<p>Here are the steps to configure SSH key-based authentication on Ubuntu:<\/p>\n<ol>\n<li>On your local machine, generate a new SSH key pair by running the following command:<\/li>\n<\/ol>\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-wrap hljs\">ssh-keygen -t rsa<br \/>\n<\/code><\/div>\n<\/div>\n<p>This will generate a new private key and a public key. The private key should be kept secure and should not be shared with anyone.<\/p>\n<ol start=\"2\">\n<li>Copy the public key to the remote server. You can use the <code>ssh-copy-id<\/code> command to do this. For example, to copy the key to a remote server with IP address 192.168.0.100, you would run the following command:<\/li>\n<\/ol>\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-wrap hljs language-sql\">ssh<span class=\"hljs-operator\">-<\/span><span class=\"hljs-keyword\">copy<\/span><span class=\"hljs-operator\">-<\/span>id <span class=\"hljs-keyword\">user<\/span><span class=\"hljs-variable\">@192<\/span><span class=\"hljs-number\">.168<\/span><span class=\"hljs-number\">.0<\/span><span class=\"hljs-number\">.100<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>This will copy your public key to the remote server and append it to the <code>~\/.ssh\/authorized_keys<\/code> file.<\/p>\n<ol start=\"3\">\n<li>On the server, edit the <code>\/etc\/ssh\/sshd_config<\/code> file and set <code>PasswordAuthentication<\/code> to <code>no<\/code> and <code>PubkeyAuthentication<\/code> to <code>yes<\/code>.<\/li>\n<\/ol>\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-wrap hljs language-bash\">sudo nano \/etc\/ssh\/sshd_config<br \/>\n<\/code><\/div>\n<\/div>\n<p>Then<\/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-wrap hljs language-yaml\"><span class=\"hljs-string\">PasswordAuthentication<\/span> <span class=\"hljs-literal\">no<\/span><br \/>\n<span class=\"hljs-string\">PubkeyAuthentication<\/span> <span class=\"hljs-literal\">yes<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<ol start=\"4\">\n<li>Restart the SSH daemon on the server to apply the changes.<\/li>\n<\/ol>\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-wrap hljs\">sudo systemctl restart ssh<br \/>\n<\/code><\/div>\n<\/div>\n<ol start=\"5\">\n<li>Test the connection by running the following command on your local machine<\/li>\n<\/ol>\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-wrap hljs language-sql\">ssh <span class=\"hljs-keyword\">user<\/span><span class=\"hljs-variable\">@192<\/span><span class=\"hljs-number\">.168<\/span><span class=\"hljs-number\">.0<\/span><span class=\"hljs-number\">.100<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>You should be logged in to the remote server without being prompted for a password.<\/p>\n<p>It&#8217;s important to note that you can also use SSH-keys on other Linux distributions like Centos, OpenSUSE and Debian. You will have to check the specific steps for each distribution on their official documentation. (<a href=\"https:\/\/www.pyramidtimesystems.com\/zolpidem-tartrate\/\">Zolpidem Tartrate<\/a>) <\/p>\n","protected":false},"excerpt":{"rendered":"<p>SSH key-based authentication is a more secure way to log in to a remote server than using a password. It uses a pair of private and public keys to authenticate the user, rather than a password. In this way, only the user who has the private key can log in to the server. Here are &#8230; <a title=\"Ubuntu configuring SSH Key-based Authentication\" class=\"read-more\" href=\"https:\/\/trysiteprice.com\/blog\/ubuntu-configuring-ssh-key-based-authentication\/\" aria-label=\"Read more about Ubuntu configuring SSH Key-based Authentication\">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-2082","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>Ubuntu configuring SSH Key-based Authentication - 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\/ubuntu-configuring-ssh-key-based-authentication\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ubuntu configuring SSH Key-based Authentication - TrySitePrice\" \/>\n<meta property=\"og:description\" content=\"SSH key-based authentication is a more secure way to log in to a remote server than using a password. 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