Codeinsane

• ทำการ Update และ Upgrade

# apt-get update && apt-get upgrade -y

• ทำการติดตั้ง Package

# apt-get install realmd sssd sssd-tools libnss-sss libpam-sss adcli samba-common-bin krb5-user -y

• ทำการกำหนด Hostname

# hostnamectl set-hostname ubt.lab.local

• ทำการตรวจสอบ Hostname

# hostnamectl

Static hostname: ubt.lab.local
       Icon name: computer-vm
         Chassis: vm
      Machine ID: 4409f54e40fc472586aca1ba7aa9772b
         Boot ID: 181d32c358b14680adef878986c247a5
  Virtualization: vmware
Operating System: Ubuntu 22.04.1 LTS
          Kernel: Linux 5.15.0-53-generic
    Architecture: x86-64
 Hardware Vendor: VMware, Inc.
  Hardware Model: VMware Virtual Platform

• ทำการแก้ไขไฟล์ /etc/krb5.conf

# vi /etc/krb5.conf

[libdefaults]
        default_realm = LAB.LOCAL

[realms]
        LAB.LOCAL = {
                kdc = dc1.lab.local
                kdc = dc2.lab.local
                admin_server = dc1.lab.local
                default_domain = lab.local
        }

• ทำการ Discover Domain

# realm discover lab.local

• ทำการ Join Domain

# realm join --user=Administrator lab.local

• ทำการ Verify Domain

# realm list

lab.local
  type: kerberos
  realm-name: LAB.LOCAL
  domain-name: lab.local
  configured: kerberos-member
  server-software: active-directory
  client-software: sssd
  required-package: sssd-tools
  required-package: sssd
  required-package: libnss-sss
  required-package: libpam-sss
  required-package: adcli
  required-package: samba-common-bin
  login-formats: %U@lab.local
  login-policy: allow-realm-logins