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+ <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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+ <html lang="en" xmlns="http://www.w3.org/1999/xhtml">
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+ <head>
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+ <title>Add Debian/Ubuntu Linux Device to Windows Active Directory</title>
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+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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+ <script type="text/javascript" src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
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+ <script type="text/javascript">
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+ $(function(){
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+ $('textarea').each(function(i,e){
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+ theTextarea = $(this);
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+ theTextarea.height((theTextarea[0].scrollHeight-5) +'px');
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+ });
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+
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+ $('li').each(function(i,e){
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+ var uuid = 'li_' + Math.floor(Math.random() * Math.floor(1000000)).toString() + '_' + i.toString();
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+ $(this).contents().wrap('<span id="'+ uuid +'"><label for="cb_'+ uuid +'"></label></span>');
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+ $(this).prepend('<input type="checkbox" class="completeBox" id="cb_' + uuid +'" rel="'+ uuid +'" />')
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+ });
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+
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+ $('code,div.codeBlock,textarea.codeBlock').each(function(i,e){
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+ theElement = $(this);
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+ var lines = theElement.html().split("\n");
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+ theElement.empty();
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+ for(l=0;l<lines.length;l++){
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+ if($.trim(lines[l]) != '' && $.trim(lines[l]).substr(0,1) != '#' && $.trim(lines[l]).indexOf(' #') == -1 && lines[l].substr(0, 4).toUpperCase() != 'REM '){
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+ theElement.append('<input type="image" src="images/clipboard.png" value="" class="copy-text" rel="copy_'+ i +'_'+ l +'" data-clipboard-text="'+ lines[l].replace(/"/g, '"') +'" /><span id="copy_'+ i +'_'+ l +'">'+ lines[l] +'</span>');
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+ } else {
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+ theElement.append(lines[l]);
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+ }
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+ }
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+ });
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+ $(document).on('click','input.copy-text',function(){
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+ theButton = $(this);
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+ $('input.copy-text').attr('src','images/clipboard.png');
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+ $('span.copy-animation').removeClass('copy-animation');
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+ try {
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+ $('#'+ theButton.attr('rel')).addClass('copy-animation');
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+ navigator.clipboard.writeText(theButton.data('clipboard-text').replace(/<[^>]*>?/gm, ''));
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+ theButton.attr('src','images/clipboard_active.png');
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+ } catch(err) {
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+ }
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+ return false;
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+ });
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+
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+ theBox = $(this);
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+ $('#'+ theBox.attr('rel')).addClass('strikethrough');
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+ theBox.prop('disabled',true);
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+ theBox.parent('li').prevAll().each(function(i,e){
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+ theLI = $(this);
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+ if(theLI.find('input[type=checkbox]').not(':checked')){
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+ $('#'+ theLI.find('input[type=checkbox]').attr('rel')).addClass('strikethrough');
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+ theLI.find('input[type=checkbox]').prop('checked',true).prop('disabled',true);
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+ }
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+ });
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+ });
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+
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+ if(window.self !== window.top){
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+ window.parent.$('iframe.stepsFrame').height((this['scrollingElement']['scrollHeight']+20) +'px');
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+ }
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+ });
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+ </script>
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+ <link href="css/steps.css" rel="stylesheet" type="text/css" />
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+ </head>
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+ <body>
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+ <div id="gridContainer">
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+ <div class="topMargin"></div>
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+ <div id="listName" class="topMargin">
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+ <h1>Add Debian/Ubuntu Linux Device to Windows Active Directory</h1>
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+ </div>
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+ <div></div>
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+ <div id="content">
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+ <h2>Installing Pre-Requesites and Configuration</h2>
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+
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+<ol>
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+ <li>Log into the Debian device and run the following commands in terminal:
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+ <div class="codeBlock">sudo apt-get update<br />
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+ # set the fully qualified host name<br />
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+ sudo hostnamectl set-hostname nettools.i12bretro.local<br />
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+ # confirm or add domain controller to DNS entries<br />
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+ sudo nano /etc/resolv.conf<br />
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+ sudo systemctl disable systemd-resolved<br />
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+ sudo systemctl stop systemd-resolved<br />
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+ sudo apt-get upgrade<br />
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+ # install required packages<br />
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+ sudo apt -y install realmd libnss-sss libpam-sss sssd sssd-tools adcli samba-common-bin oddjob oddjob-mkhomedir packagekit<br />
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+ sudo realm discover i12bretro.local</div>
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+ </li>
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+ <li>Paste the following text into /etc/krb5.conf
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+ <div class="codeBlock">[libdefaults]<br />
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+ dns_lookup_realm = false<br />
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+ ticket_lifetime = 24h<br />
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+ renew_lifetime = 7d<br />
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+ forwardable = true<br />
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+ rdns = false<br />
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+ default_realm = I12BRETRO.LOCAL<br />
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+ default_ccache_name = KEYRING:persistent:%{uid}</div>
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+ </li>
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+ <li>Press CTRL+O, Enter, CTRL+X to write the changes to /etc/krb5.conf</li>
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+ <li>Continue with the following commands in terminal:
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+ <div class="codeBlock">sudo realm join -U i12bretro i12bretro.local<br />
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+ # check the configured value of the domain<br />
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+ sudo realm list</div>
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+ </li>
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+ <li>Paste the following lines into terminal together to enable automatically creating user home directories:
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+ <div class="codeBlock">sudo bash -c "cat > /usr/share/pam-configs/mkhomedir" <<eof<br> Name: activate mkhomedir<br />
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+ Default: yes<br />
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+ Priority: 900<br />
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+ Session-Type: Additional<br />
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+ Session:<br />
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+ required pam_mkhomedir.so umask=0022 skel=/etc/skel<br />
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+ EOF</eof<br></div>
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+ </li>
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+ <li>Continue with the following commands in terminal:
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+ <div class="codeBlock">sudo pam-auth-update</div>
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+ </li>
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+ <li>Arrow down to activate mkhomedir > Press spacebar to select > Press Enter to confirm</li>
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+ <li>Run one or more of the following commands in terminal to grant active directory users or groups access to log into the linux machine:
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+ <div class="codeBlock"># add specific user(s )<br />
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+ realm permit user1@i12bretro.local user2@i12bretro.local<br />
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+ # add specific group(s)<br />
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+ sudo realm permit -g 'LinuxUsers' 'Linux Admins'<br />
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+ # add everyone<br />
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+ sudo realm permit --all<br />
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+ # deny everyone<br />
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+ sudo realm deny --all</div>
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+ </li>
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+ <li>Similarly, run the following command to edit /etc/sudoers.d/domain_admins to add specific users or groups to the sudoers file:
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+ <div class="codeBlock">sudo nano /etc/sudoers.d/domain_admins<br />
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+ # add specific user(s )<br />
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+ user1@i12bretro.local ALL=(ALL) ALL<br />
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+ user2@i12bretro.local ALL=(ALL) ALL<br />
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+ # add specific group(s)<br />
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+ %LinuxUsers@i12bretro.local ALL=(ALL) ALL<br />
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+ %Linux\ Admins@i12bretro.local ALL=(ALL) ALL</div>
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+ </li>
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+ <li>Press CTRL+O, Enter, CTRL+X to write the changes to /etc/sudoers.d/domain_admins</li>
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+</ol>
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+
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+<h2>Testing Active Directory Authentication</h2>
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+
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+<ol>
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+ <li>Attempt to login to the Debian device either into a desktop environment or via SSH. The user name must be formatted like user1@i12bretro.local and the password will be the active directory password</li>
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+</ol>
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+
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+<p>Additonal reading: <a href="https://computingforgeeks.com/join-ubuntu-debian-to-active-directory-ad-domain/" target="_blank">https://computingforgeeks.com/join-ubuntu-debian-to-active-directory-ad-domain/</a></p>
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+ </div>
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+ </div>
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+ </body>
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+ </html>
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+
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i12bretro