强制apt使用IPv4

# root

echo 'Acquire::ForceIPv4 "true;"' > /etc/apt/apt.conf.d/99force-ipv4

# root echo 'Acquire::ForceIPv4 "true;"' > /etc/apt/apt.conf.d/99force-ipv4

# root
echo 'Acquire::ForceIPv4 "true;"' > /etc/apt/apt.conf.d/99force-ipv4

四号程序员