ubuntu系统，源需要更换成下面的：vim/etc/apt/sources.listdeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionicmainrestricteduniversemultiverse#deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ bionicmainrestricteduniversemultiversedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bi...