国内的教程都是你抄我，我抄你，完全没有自己试过的，大批量教程里让你改/etc/named文件，这特么哪有这个文件，实际修改方式如下：
修改/etc/sysconfig/named文件，修改为如下
#BIND named process options
# ~~~~~~
OPTIONS=”-4″
# — These additional options will be passed to named
# at startup. Don’t add -t here, enable proper
# -chroot.service unit file.
# Use of parameter -c is not supported here. Extend
# systemd named*.service instead. For more
# information please read the following KB article:
# https://access.redhat.com/articles/2986001
#DISABLE_ZONE_CHECKING — By default, service file calls named-checkzone
# utility for every zone to ensure all zones are
# valid before named starts. If you set this option
# to ‘yes’ then service file doesn’t perform those
# checks.