我在 Ubuntu 15.04 上，我刚刚安装了vsftpd. 当我运行命令时service vsftpd status，我得到以下输出：
vsftpd.service - vsftpd FTP server
Loaded: loaded (/lib/systemd/system/vsftpd.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2015-10-09 19:18:50 IST; 3min 11s ago
Process: 2981 ExecStart=/usr/sbin/vsftpd /etc/vsftpd.conf (code=exited, status=2)
Process: 2979 ExecStartPre=/bin/mkdir -p /var/run/vsftpd/empty (code=exited, status=0/SUCCESS)
Main PID: 2981 (code=exited, status=2)
Oct 09 19:18:50 harshal-Lenovo-B40-70 systemd[1]: Starting vsftpd FTP server...
Oct 09 19:18:50 harshal-Lenovo-B40-70 systemd[1]: Started vsftpd FTP server.
Oct 09 19:18:50 harshal-Lenovo-B40-70 systemd[1]: vsftpd.service: main process exited, …