script to disable IPV6 on ubuntu22 LT

ubuntu22_ipv6_disable.sh

#!/bin/bash

# Append IPv6 disable configuration to /etc/sysctl.conf
echo "net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1" | sudo tee -a /etc/sysctl.conf > /dev/null

# Apply the changes
sudo sysctl -p

# Create /etc/rc.local if it doesn't exist
if [ ! -f /etc/rc.local ]; then
    sudo touch /etc/rc.local
    sudo chmod +x /etc/rc.local
    echo "#!/bin/bash" | sudo tee /etc/rc.local > /dev/null
    echo "# /etc/rc.local" | sudo tee -a /etc/rc.local > /dev/null
fi

# Add commands to /etc/rc.local
sudo sed -i '/exit 0/d' /etc/rc.local
echo "/etc/sysctl.d" | sudo tee -a /etc/rc.local > /dev/null
echo "/etc/init.d/procps restart" | sudo tee -a /etc/rc.local > /dev/null
echo "exit 0" | sudo tee -a /etc/rc.local > /dev/null

# Change permission of /etc/rc.local
sudo chmod 755 /etc/rc.local

#check results 
ip a

can be run with

sudo bash -c "$(curl -fsSL https://gist.githubusercontent.com/joshespi/835fb585055e47ca332eba52a4190d02/raw/73bab2c25e019d11444eae7e670263e8e3bb3c83/ubuntu22_ipv6_disable.sh)"

tested, worked fine for Raspberry pi OS