通过apt-get install vsftp提示找不到安装包的解决办法
修改 /etc/apt/sources.list, 加入
deb http://ftp.us.debian.org/debian stable main contrib non-free
deb http://ftp.us.debian.org/debian-non-US stable/non-US main contrib non-free
deb http://ftp.us.debian.org/debian testing main contrib non-free
deb http://ftp.us.debian.org/debian-non-US testing/non-US main contrib non-free
deb http://ftp.us.debian.org/debian unstable main contrib non-free
deb http://ftp.us.debian.org/debian-non-US unstable/non-US main contrib non-free
执行 apt-get update 更新软件库