cmdref.net is command references/cheat sheets/examples for system engineers.
| Cloud |
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| Etc |
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| Reference |
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| Operation | Commands |
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| checking configuration | /etc/init.d/named configtest |
| checking named.conf | named-checkconf named-checkconf /etc/named.conf |
| checking grammar | named-checkzone ZONE_NAME FILE named-checkzone example.com /var/named/named.example.com named-checkzone 10.in-addr.arpa /var/named/named.rev |
| Update All Zone Contents | rndc reload |
| Update example.com Zone Contents | rndc reload example.com |
| add new zone file | rndc reconfig |
| In DNS Server if you are not collect a name resolution, you use rndc command. | rndc flushname SERVER1 rndc flushname SERVER1.EXAMPLE.COM |
| In DNS Server/Client Host if you are useing nscd, you use nscd command. | nscd -i hosts |
[user01@centos7 ~]$ dig google.com | grep ^google.com google.com. 287 IN A 172.217.26.46 [user01@centos7 ~]$ [user01@centos7 ~]$ [user01@centos7 ~]$ dig google.com | grep ^google.com google.com. 285 IN A 172.217.26.46 [user01@centos7 ~]$ [user01@centos7 ~]$ dig google.com | grep ^google.com google.com. 284 IN A 172.217.26.46 [user01@centos7 ~]$
[user01@centos7 ~]$ while : ; do echo -n "`date ` : " ; dig google.com | grep ^google.com ; sleep 1 ; done Wed May 24 20:12:16 JST 2017 : google.com. 164 IN A 172.217.26.46 Wed May 24 20:12:17 JST 2017 : google.com. 163 IN A 172.217.26.46 Wed May 24 20:12:18 JST 2017 : google.com. 161 IN A 172.217.26.46 Wed May 24 20:12:19 JST 2017 : google.com. 160 IN A 172.217.26.46 Wed May 24 20:12:20 JST 2017 : google.com. 159 IN A 172.217.26.46 Wed May 24 20:12:21 JST 2017 : google.com. 158 IN A 172.217.26.46 ^C