Centos does not have the hostdignslookup command. today, when installing the DNS server, I want to test the DNS server and find that the hostdignslookup command is not installed, get yuminstallbind-untils now... centos does not have the host dig nslookup command. today, when installing the DNS server, I want to test the DNS server and find that the host dig nslookup command is not installed, immediately yum install bind-untils to close the job. if: stop named: [OK] Generating/etc/rndc appears. key: rndc. if there is a problem with key generation, you can regenerate rndc-confgen-r/dev/urandom-a wrote key file "/etc/rndc. key "and then restart/etc/init. d/named restart: when the master/slave DNS server is configured, the master/slave node cannot be synchronized. study "IN {type: master; name:" named. zhao. study "; allow-transfer {192.168.1.105} ;}; the configuration of the slave server zone is as follows: zone" zhao. study "IN {type: slave; file:" named. zhao. study "; masters {192.168.1.108 };}; after the master-slave server is started, it is found that the synchronization cannot be completed. then, it is found that the also-policy and policy options are not configured in the zone of the master DNS server, modify zone "zhao. study "IN {type: master; name:" named. zhao. study "; also-policy {192.168.1.108 ;}; notify yes; allow-transfer {192.168.1.105 };}; then restart the primary DNS server and check that the master-slave synchronization starts.
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