CentOS 7
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Join in Windows Active Directory2014/12/24

Join in Windows Active Directory Domain.
This tutorial needs Windows Active Directory Domain Service in your LAN.
This example shows to configure on the environment below.
Domain Server : Windows Server 2012 R2
NetBIOS Name : FD3S01
Domain Name : srv.world
Hostname : fd3s.srv.world
[1] Install some required packages.
[root@dlp ~]#
yum -y install realmd sssd oddjob oddjob-mkhomedir adcli samba-common samba-common-tools krb5-workstation
[2] Join in Windows Active Directory Domain.
# change the DNS to AD's one

[root@dlp ~]#
nmcli c modify ens3 ipv4.dns

[root@dlp ~]#
nmcli c down ens3; nmcli c up ens3

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/1)
# discover Active Directory domain

[root@dlp ~]#
realm discover SRV.WORLD

  type: kerberos
  realm-name: SRV.WORLD
  domain-name: srv.world
  configured: no
  server-software: active-directory
  client-software: sssd
  required-package: oddjob
  required-package: oddjob-mkhomedir
  required-package: sssd
  required-package: adcli
  required-package: samba-common

# join in Active Directory domain

[root@dlp ~]#
realm join SRV.WORLD

Password for Administrator:    
# AD's Administrator password
# make sure it's possible to get an AD user info or not

[root@dlp ~]#
id FD3S01\\Serverworld

uid=406801001(serverworld@srv.world) gid=406800513(domain users@srv.world) groups=406800513(domain users@srv.world)
# make sure it's possible to switch to an AD user or not

[root@dlp ~]#
su - FD3S01\\Serverworld

Creating home directory for serverworld@srv.world.
[serverworld@srv.world@dlp ~]$    
# just switched
[3] If you'd like to omit domain name for AD user, configure like follows.
[root@dlp ~]#
vi /etc/sssd/sssd.conf
# line 16: change

use_fully_qualified_names =
[root@dlp ~]#
systemctl restart sssd

[root@dlp ~]#
id Administrator

uid=406800500(administrator) gid=406800513(domain users) groups=406800513(domain users),
406800572(denied rodc password replication group),406800518(schema admins),
406800520(group policy creator owners),406800512(domain admins),406800519(enterprise admins)
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