• Before we join the system to a domain we need to install some prerequisites.

command     #yum install realmd samba samba-common oddjob oddjob-mkhomedir sssd ntpdate ntp

  • Then enable the ntp services and sync the time with the DC clock, failing to do so may result in some of the later commands to fail.

command    # systemctl enable ntpd.service

command    # ntpdate dc1.mydomain.local

command    # systemctl start ntpd.service

  • Once you have finished with the above, simply type in the bellow command using the right username and domain.

command    # realm join –user=adminuser@mydomain.local mydomain.local

command    # realm list