How to Join Centos to Windwos Domain

Here's a pretty detailed article I found on the issue on rootusers:

https://www.rootusers.com/how-to-join-centos-linux-to-an-active-directory-domain/

thanks for the swift response Will, however when i try this line from that guide

realm join --user=administrator example.com

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it gives me the following
"bash: realm: command not found "

am I missing to install realm and if so what would be the repo?

Sorry about that, I made an assumption on my end, haha. Here's another guide that includes the repo package you should need to join AD:

https://outsideit.net/realmd-sssd-ad-authentication/

This one isn't as detailed, of course, but it will give you the necessary repo.

hmm,

so with the second guide, installing the applications gives me an error below

Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: centos-distro.cavecreek.net
 * extras: centos.unixheads.org
 * updates: centos.mbni.med.umich.edu
No package realmd available.
Package sssd-1.13.3-57.el6_9.x86_64 already installed and latest version
Package oddjob-0.30-6.el6.x86_64 already installed and latest version
Package oddjob-mkhomedir-0.30-6.el6.x86_64 already installed and latest version
Package adcli-0.8.1-1.el6.x86_64 already installed and latest version
Package samba-common-3.6.23-45.el6_9.x86_64 already installed and latest version
No package samba-common-tools available.
Package ntpdate-4.2.6p5-10.el6.centos.2.x86_64 already installed and latest version
Package ntp-4.2.6p5-10.el6.centos.2.x86_64 already installed and latest version
Nothing to do

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and therefore step 2 line, two doesn't go beyond

systemctl enable ntpd.service
bash: systemctl: command not found

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Hmm, that is an interesting one. I'm on a Windows-based PC right now and don't really have access to Linux. I'll do some digging and see if I can figure out why realm wouldn't be available. Maybe something about that package has changed or realm has changed.

hence no response from anybody else i was forced to research deep everywhere else until achieve my goal

I'm having the same issue as Ivan, none of the repo's I have for my CentOS 7 have the required packages I need to install so I can join this server to my domain.

Anyone have updated repo's that will install all these packages needed?

yum -y install adcli sssd authconfig pam_krb5 samba4-common