Job for vsftpd.service failed because the control process exited with error code

I can not restart the vsftpd. [root@localhost vsftpd]# service vsftpd restart Redirecting to /bin/systemctl restart vsftpd.service Job for vsftpd.service failed because the control process exited with error code. See "systemctl status vsftpd.service" and "journalctl -xe" for details. --- I use the systemctl status vsftpd -l to check: [root@localhost ~]# systemctl status vsftpd -l ● vsftpd.service - Vsftpd ftp daemon Loaded: loaded (/usr/lib/systemd/system/vsftpd.service; disabled; vendor preset: disabled) Active: failed (Result: exit-code) since Sun 2017-06-18 17:14:15 CST; 2h 49min ago Process: 33103 ExecStart=/usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf (code=exited, status=1/FAILURE) Jun 18 17:14:12 localhost.localdomain systemd: Starting Vsftpd ftp daemon... Jun 18 17:14:15 localhost.localdomain systemd: vsftpd.service: control process exited, code=exited status=1 Jun 18 17:14:15 localhost.localdomain systemd: Failed to start Vsftpd ftp daemon. Jun 18 17:14:15 localhost.localdomain systemd: Unit vsftpd.service entered failed state. Jun 18 17:14:15 localhost.localdomain systemd: vsftpd.service failed. ---- And be attention, in my /etc/vsftpd/vsftpd.conf, I have changed the : listen=YES listen_ipv6=NO ---- I use the journalctl -xe, I get the below information: [root@localhost vsftpd]# journalctl -xe (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza Jun 18 20:09:46 localhost.localdomain polkitd: /etc/polkit-1/rules.d/49-p (pkla-check-authorization: ' Jun 18 20:09:46 localhost.localdomain polkitd: Error evaluating authoriza