##------------##
#    System    #
##------------##

hostnamectl set-hostname $hostname
sed -i 's/;preserve_hostname: false/preserve_hostname: true/g' /etc/cloud/cloud.cfg
timedatectl set-timezone Europe/Amsterdam


##----------##
#    Swap    #
##----------##

if free | awk '/^Swap:/ {exit !$2}'; then
    echo "swap enabled"
else
    fallocate -l 1G /swapfile
    chmod 600 /swapfile
    mkswap /swapfile
    swapon /swapfile
    echo '/swapfile swap swap defaults 0 0' >> /etc/fstab
fi
sed -i 's/#/vm.swappiness=10/g' /etc/sysctl.conf
sed -i 's/#/vm.vfs_cache_pressure=50/g' /etc/sysctl.conf


##-------------##
#    Postfix    #
##-------------##

#Checking if postfix exists on this system and if so it wil be removed to prevent config conflicts
if dpkg-query -Wf'${db:Status-abbrev}' postfix 2>/dev/null | grep -q '^i'; then apt purge -y postfix > $OUTPUT 2>&1; fi

debconf-set-selections <<< "postfix postfix/mailname string $domain"
debconf-set-selections <<< "postfix postfix/main_mailer_type string 'Internet Site'"