Create the swap file based on amount of physical memory on machine (Maximum size of swap is 4GB)

function createSwap() {
local swapmem=$(($(getPhysicalMemory) * 2))

Anything over 100MB in swap is probably unnecessary as a RAM fallback for Pi's

if [ ${swapmem} -gt 4 ]; then
swapmem=100
fi

sudo fallocate -l "${swapmem}M" /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
}

Function should set swap to 100M not in GB as we shouldn't be swapping to the TF card anyway.

This is my function from my autopai git repo https://github.com/tim0n3/AutoPai and it needs to be adapted for ubuntu either by modifying the case statement or by checking the OS in the /etc/os-releases file and the correct config should apply as this doesn't use the correct service files anymore due to the rewrite of the program from v1.9 to v1.10-rc1

_modem_service_install() {
read -n1 -p "Install modem & watchdog service? (y/n):" serviceinstall
case ${serviceinstall:0:1} in
y|Y )
echo "--------------------------------------"
echo "-- SystemV service install --"
echo "--------------------------------------"
cp /home/pi/app/energydrive.service /etc/systemd/system/energydrive.service ;
cp /home/pi/app/watchdog.service /etc/systemd/system/watchdog.service ;
systemctl enable energydrive.service ;
systemctl stop energydrive.service ;
systemctl enable watchdog.service ;
systemctl stop watchdog.service ;
##ubuntu
#cp /home/ubuntu/app/energydrive.service /etc/systemd/system/energydrive.service ;
#cp /home/ubuntu/app/watchdog.service /etc/systemd/system/watchdog.service ;
#systemctl enable energydrive.service ;
#systemctl stop energydrive.service ;
#systemctl enable watchdog.service ;
#systemctl stop watchdog.service ;

;;
n|N )
	echo "You've opted to install the services later"
;;
esac

}

This function in the setup-script only works on raspiOS or linux distro's still using ifconfig's config file method to configure interfaces.

ubuntu uses netplan so this will have to be converted to yaml and moved into the cloud-init yaml files and invoke on initialization.

check-internet.sh doesn't exist in this repo.

_create_crontabs() {
echo "--------------------------------------"
echo "-- Creating crontabs: --"
echo "--------------------------------------"
cat <<EOF | crontab -
@daily /sbin/shutdown -r +5
@hourly /bin/bash /home/pi/AutoPai/check-internet.sh
EOF
echo "--------------------------------------"
echo "-- Crontabs created --"
echo "--------------------------------------"
}

Hi (CP),

Please, may you update the readme instructions so that I can start testing?

Can't do much in the way of configuring ubuntu core as it's entirely based on snaps (snapd) . everything including the base system runs within a snap container. This means the distro would be better suited for containerization instead of PaaS/SaaS activities like we require.

Please, update the readme accordingly