systemctl start named-chroot执行时报错。麻烦帮忙定位，谢谢。 # systemctl status named-chroot.service -l ● named-chroot.service - Berkeley Internet Name Domain (DNS)   Loaded: loaded (/usr/lib/systemd/system/named-chroot.service; disabled; vendor preset: disabled)   Active: failed (Result: exit-code) since Fri 2016-09-23 08:30:55 CST; 10min ago  Process: 3705 ExecStart=/usr/sbin/named -u named -t /var/named/chroot $OPTIONS (code=exited, status=1/FAILURE)Sep 23 08:30:55 localhost.localdomain systemd : named-chroot.service: control process exited, code=exited status=1Sep 23 08:30:55 localhost.localdomain systemd : Failed to start Berkeley Internet Name Domain (DNS).Sep 23 08:30:55 localhost.localdomain systemd : Unit named-chroot.service entered failed state.Sep 23 08:30:55 localhost.localdomain systemd : named-chroot.service failed.