+Systemd changes the vsftpd daemon start-up. The vsftpd package contains vsftpd-generator script generating symbolic links to /var/run/systemd/generator/vsftpd.target.wants directory. The generator is called during e.g. 'systemctl --system daemon-reload'. All these symbolic links link /usr/lib/systemd/system/vsftpd@.service file.
+The vsftpd daemon(s) is/are controlled by one of following ways:
+.Pp
+1. Single daemon using default /etc/vsftpd/vsftpd.conf configuration file
+.br
+# systemctl {start,stop,...} vsftpd[.service]
+.Pp
+2. Single daemon using /etc/vsftpd/<conf-name>.conf
+Systemd changes the vsftpd daemon start-up. The vsftpd package contains vsftpd-generator script generating symbolic links to /var/run/systemd/generator/vsftpd.target.wants directory. The generator is called during e. g. 'systemctl --system daemon-reload'. All these symbolic links link /usr/lib/systemd/system/vsftpd@.service file.
+The vsftpd daemon(s) is/are controlled by one of following ways:
+.P
+1. Single daemon using default /etc/vsftpd/vsftpd.conf configuration file
+.br
+# systemctl {start,stop,...} vsftpd[.service]
+.P
+2. Single daemon using /etc/vsftpd/<config-filename>.conf