cat <<EOF >/etc/apt/sources.list
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy main restricted
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates main restricted
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy universe
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates universe
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted
deb http://security.ubuntu.com/ubuntu/ jammy-security universe
deb http://security.ubuntu.com/ubuntu/ jammy-security multiverse
EOF
apt update && apt install -y wget