# 1. Aggiorna OS
sudo apt update && sudo apt -y upgrade   # Ubuntu/Debian
sudo apt install -y iputils-ping
sudo apt install -y telnetd telnet
sudo snap install -y kubectl --classic
sudo apt install -y iptables
sudo apt install -y iptables-persistent




# 2. Disabilita SWAP (necessario)
sudo swapoff -a
sudo sed -i.bak '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

# 3. Config kernel requisiti Kubernetes (es. bridge netfilter)
cat <<EOF | sudo tee /etc/sysctl.d/99-k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.inotify.max_user_watches         = 524288
EOF
sudo sysctl --system

# 4. Sincronizza orologio
sudo apt install -y chrony
sudo systemctl enable --now chrony

#installa yq
sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
sudo chmod a+x /usr/local/bin/yq
# 5. Imposta hostname (es.)
#sudo hostnamectl set-hostname $1