ubuntu_domain_join.sh

#! /bin/bash
set -e

#Re-run the script if not using sudo/root
detect_current_uid() {
	echo $(id -u)
}

rerun_script_as_root() {
	if [ $(detect_current_uid) -ne "0" ]; then
		local ENVVARS=$(echo $@)

		echo "Re-running script as root..."
		exec sudo $ENVVARS bash $0
	fi
}

rerun_script_as_root

read -p "Enter domain user (username@domain.tld): " full_user
user=${full_user%@*}
domain=${full_user#*@}
domain_upper=$(echo "$domain" | tr '[:lower:]' '[:upper:]')

apt-get update
apt-get upgrade -y
apt-get install realmd sssd samba-common samba-common-bin samba-libs sssd-tools krb5-user adcli packagekit vim -y

kinit -V $user
realm --verbose join -U $user $domain

echo "ad_hostname = $(hostname).$domain" >> /etc/sssd/sssd.conf
echo "dyndns_update = True" >> /etc/sssd/sssd.conf
service sssd restart

#Domain Users get home directory
if [ -f /etc/pam.d/common-session ]
then
	echo 'session required pam_mkhomedir.so skel=/etc/skel/ umask=0022' >> /etc/pam.d/common-session
fi

#Allow Unity Sessions
if [ -f /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf ]
then
	echo 'greeter-show-manual-login=true' >> /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf
fi

if [ -f /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf ]
then
	echo 'greeter-hide-users=true' >> /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf
fi

if [ -f /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf ]
then
	echo 'allow-guest=false' >> /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf
fi

echo "%domain\ admins@$domain	ALL=(ALL:ALL) ALL" >> /etc/sudoers
echo "%linuxadmins@$domain	ALL=(ALL:ALL) ALL" >> /etc/sudoers