The USERNAME format should be: I tried with my nbeam account first, which should NOT have sudoer permissions. I then tested with the jdoe account and could login and elevate and the same with the administrator account.I finally added one more dummy account in Active Directory with no group memberships and attempted to login and got denied. Enabling Desktop Authentication Finally, we need to enable a few more things to get authentication into the GUI desktop working.
Then the pertinent part of the rest of the message that follows after the above: Followed by yet another DNS error “ERROR_DNS_GSS_ERROR” and then finally a note about the SSSD service starting and “successfully enrolled machine in the realm.” You can now check to make sure your machine is truly joined by running realm list: uid=270401106([email protected]) gid=270400513(domain [email protected]) groups=270400513(domain [email protected]),270400572(denied rodc password replication [email protected]),270400512(domain [email protected]),270401104([email protected])As a side note, if you change group memberships on your domain controller midway through but “id [email protected]” is still not showing the updated groups, then use the command “sss_cache –users” to clear the credentials cache and then try again, that should tell Ubuntu to fetch their user info fresh from the DC.
First Test of Truth – SSH Login with Domain Credentials You can skip this if you don’t plan on using SSH.
nbeam published 1 year ago in Authentication, Domain Administration, Information Security, Linux, Microsoft, Server 2012R2, Ubuntu, Windows Administration.
Tags: Add Linux Desktop to Windows Domain, Add Linux Server to Windows Domain, Add Ubuntu to Windows Domain, Dynamic DNS Updates In Windows Domain from Linux Member, Join Ubuntu to a Windows Domain using Realm D and SSSD, Light DM, Realm D, SSSD For this tutorial I will be walking through how to use a tool called Realmd to connect an Ubuntu Server or Ubuntu Desktop system to a Windows Active Directory Domain.
Now it is time for the first test of domain authentication.
Open up an SSH session to your server and try to login with your domain credentials.If you hop on your domain controller and look in DNS, you should see an entry for your Ubuntu machine.That all sounds quick and easy above but it took a lot of digging to figure out…Today we will be using a suite of tools called SSSD. Furthermore we will be using Realm D, which is a “wrapper” of sorts for SSSD that makes it easier to setup and configure. read this: How To Choose A Sensible Local Domain Name – There are really good reasons not to use a “fake” TLD or to use what are honestly often traditional Microsoft conventions like .local – I ran into a world of headache with Ubuntu using a .local TLD when I tried to do this the first time through!If your company has already standardized on .local I will be writing something separate about how to handle it because Ubuntu Desktop has some issues with it and for good reason…If you are running the server version of Ubuntu then SSH is probably already installed, if not (i.e.