SOP: SODE Ubuntu Server Setup

Ubuntu Server Setup SOP

Note: General Nutanix and Active Directory skills are assumed and not spelled out step by step.

Create a VM from template UBUNTU_Template_24_04_2 or newer
Power on VM and access via local administrator profile
Update Apps
1. sudo apt update
2. sudo apt upgrade
Change name to FQDN
1. $ sudo hostnamectl set-hostname ubuntudesk1.corp.globomantics.local
2. $ hostnamectl
Update hosts name
1. Sudo nano /etc/hosts
  1. Make sure one loopback line is correct
2. sudo systemctl restart systemd-resolved
To change IP address and DNS
1. Sudo nano /etc/netplan/….yaml - to modify IP settings
  1. (Probably 50-cloud-init.yaml)
2. sudo netplan apply
3. sudo grep -l -R "x.x.x.x old IP address" /etc/*
  1. Often shows;
    1. /etc/cloud/cloud.cfg.d/90-installer-network.cfg
    2. /etc/netplan/50-cloud-init.yaml
4. sudo nano to any .cfg files found in prior step
5. Configure DNS
  1. Sudo nano /etc/systemd/resolved.conf
    1. DNS=x.x.x.x
    2. FallbackDNS=x.x.x.x
6. sudo reboot
Join Ubuntu server to AD
1. Discover Domain and add server
  1. Create /etc/krb5.conf and add following;

[libdefaults]

rdns =false

sudo realm discover factory.oatly.local
sudo realm join -v -U admteolT1 FACTORY.OATLY.LOCAL –computer-ou=’OU=Linux,DC=FACTORY,DC=OATLY,DC=LOCAL’
1. (Note: two dashes in front of “computer-ou”)
realm list
Add site ad_site to sudo nano /etc/sssd/sssd.conf
1. Example:
  1. [domain/yourdomain.local]
  2. ad_site = Your-AD-Site-Name

[domain/factory.oatly.local]

default_shell = /bin/bash

krb5_store_password_if_offline = True

cache_credentials = True

krb5_realm = FACTORY.OATLY.LOCAL

realmd_tags = manages-system joined-with-adcli

id_provider = ad

fallback_homedir = /home/%u@%d

ad_domain = factory.oatly.local

use_fully_qualified_names = True

ldap_id_mapping = True

access_provider = ad

ad_site = OATNLPRD

ad_gpo_ignore_unreadable = True

{blank line}

%Domain\ Legacy\ Computer\ Admins@FACTORY.OATLY.LOCAL ALL=(ALL:ALL) ALL

NOTE: spaces after backslashes