Asterisk installation on ubuntu

asterisk.sh

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sudo apt update
sudo apt-get upgrade -y
apt-get clean all
apt-get update
apt-get upgrade

sudo addgroup --quiet --system asterisk
sudo adduser --quiet --system --ingroup asterisk --no-create-home --disabled-password asterisk
sudo systemctl enable asterisk
sudo systemctl start asterisk
sudo systemctl status asterisk
sudo systemctl restart asterisk
sudo systemctl status asterisk
sudo ufw status
sudo ufw allow 5060/udp