Ubuntu/Old/UbuntuJoinDomain.sh

#!/bin/bash

# Load configuration file
source config.sh

# Load password file
read -r ADMINUSER ADMINPASS < adm.txt

# Set the hostname
sudo hostnamectl set-hostname $NEW_HOSTNAME

# Update /etc/hosts
echo "127.0.0.1 localhost" | sudo tee /etc/hosts
echo "$NEW_HOSTNAME $(hostname -I | cut -d' ' -f1)" | sudo tee -a /etc/hosts

# Update /etc/hostname
echo $NEW_HOSTNAME | sudo tee /etc/hostname

# Update and install required packages
sudo apt update
sudo apt install -y sudo apt -y install realmd libnss-sss libpam-sss sssd sssd-tools adcli samba-common-bin oddjob oddjob-mkhomedir packagekit

# Join the domain
sudo realm join -U $ADMINUSER $DOMAIN

# Configure SSSD
sudo sed -i 's/use_fully_qualified_names = True/use_fully_qualified_names = False/g' /etc/sssd/sssd.conf
sudo systemctl restart sssd

# Allow domain users to log in to the machine
sudo sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config
sudo systemctl restart sshd

# Configure PAM to create home directories for domain users on first login
sudo bash -c "cat >> /usr/share/pam-configs/mkhomedir" << EOL
Name: Activate mkhomedir
Default: yes
Priority: 900
Session-Type: Additional
Session:
        required    pam_mkhomedir.so umask=0077 skel=/etc/skel
EOL

# Enable the mkhomedir PAM module
sudo pam-auth-update --force

# Set permissions for the home directories
sudo chmod 0700 /home/*

# Install any additional software
sudo apt install -y <software-package-name>

# Query user and print message
id chagood && echo "Successfully queried Active Directory for user chagood"