$apt-get install vsftpd

==>會出現一行錯誤

invoke-rc.d: policy-rc.d denied execution of start.

$service vsftpd satrt

結果顯示如下
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service vsftpd satrt

The script you are attempting to invoke has been converted to an Upstart
job, but satrt is not supported for Upstart jobs.

查看狀態

$ service vsftpd status

顯示如下訊息

Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service vsftpd status

Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the status(8) utility, e.g. status vsftpd

可以請教一下，如何正常安裝vsftpd嗎?