How to query the resolvconf database?
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The Description of resolveconf in it's manual page tells us: "The resolvconf package comprises a simple database for run-time nameserver information ...".
What is clear in the manual page is how to add or remove information to that database.
But, How to query it?.
networking resolvconf
asked Dec 23 '17 at 15:22
jgomo3
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up vote
3
down vote
favorite
The Description of resolveconf in it's manual page tells us: "The resolvconf package comprises a simple database for run-time nameserver information ...".
What is clear in the manual page is how to add or remove information to that database.
But, How to query it?.
networking resolvconf
asked Dec 23 '17 at 15:22
jgomo3
1164
add a comment |Â
up vote
3
down vote
favorite
up vote
3
down vote
favorite
The Description of resolveconf in it's manual page tells us: "The resolvconf package comprises a simple database for run-time nameserver information ...".
What is clear in the manual page is how to add or remove information to that database.
But, How to query it?.
networking resolvconf
asked Dec 23 '17 at 15:22
jgomo3
1164
The Description of resolveconf in it's manual page tells us: "The resolvconf package comprises a simple database for run-time nameserver information ...".
What is clear in the manual page is how to add or remove information to that database.
But, How to query it?.
networking resolvconf
asked Dec 23 '17 at 15:22
jgomo3
1164
asked Dec 23 '17 at 15:22
jgomo3
1164
asked Dec 23 '17 at 15:22
jgomo3
1164
asked Dec 23 '17 at 15:22
jgomo3
1164
1164
add a comment |Â
add a comment |Â
1 Answer
1
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votes
up vote
2
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ls /etc/resolvconf/run/interface
will list all the pieces of nameserver information that have been added to resolvconf database. Their names will usually identify the interface to which they're associated, and possibly other things.
These are all text files, effectively fragments of /etc/resolv.conf. So you can view them with any text viewer utility.
For example, on my home gateway system (Debian 9):
# ls /etc/resolvconf/run/interface/
eth2.dhclient eth2.ip6.dhclient lo.inet lo.named
eth2 is my external interface that gets its configuration via DHCP. The default domain and IPv4 DNS servers provided by my ISP's DHCP server are in file eth2.dhclient. The file eth2.ip6.dhclient has the same information for IPv6. lo.inet contains the domain search line I've set locally, and it overrides the default domain set by the ISP. And since I run a local BIND for my private home DNS domain, once BIND has started up, Debian's systemd configuration for it will optionally add a nameserver 127.0.0.1 line as lo.named.
Since /etc/resolvconf/interface-order file says that lo takes priority over anything else, the search line from lo.inet will always go to the real /etc/resolv.conf. If my BIND is running, it will be used as a local nameserver; but if it fails for some reason and systemd is unable to restart it, the dependencies in systemd configuration will cause the lo.named to be removed, and then nameserver 127.0.0.1 in /etc/resolv.conf will be automatically replaced by ISP's nameservers.
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
ls /etc/resolvconf/run/interface
will list all the pieces of nameserver information that have been added to resolvconf database. Their names will usually identify the interface to which they're associated, and possibly other things.
These are all text files, effectively fragments of /etc/resolv.conf. So you can view them with any text viewer utility.
For example, on my home gateway system (Debian 9):
# ls /etc/resolvconf/run/interface/
eth2.dhclient eth2.ip6.dhclient lo.inet lo.named
eth2 is my external interface that gets its configuration via DHCP. The default domain and IPv4 DNS servers provided by my ISP's DHCP server are in file eth2.dhclient. The file eth2.ip6.dhclient has the same information for IPv6. lo.inet contains the domain search line I've set locally, and it overrides the default domain set by the ISP. And since I run a local BIND for my private home DNS domain, once BIND has started up, Debian's systemd configuration for it will optionally add a nameserver 127.0.0.1 line as lo.named.
Since /etc/resolvconf/interface-order file says that lo takes priority over anything else, the search line from lo.inet will always go to the real /etc/resolv.conf. If my BIND is running, it will be used as a local nameserver; but if it fails for some reason and systemd is unable to restart it, the dependencies in systemd configuration will cause the lo.named to be removed, and then nameserver 127.0.0.1 in /etc/resolv.conf will be automatically replaced by ISP's nameservers.
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
add a comment |Â
up vote
2
down vote
ls /etc/resolvconf/run/interface
will list all the pieces of nameserver information that have been added to resolvconf database. Their names will usually identify the interface to which they're associated, and possibly other things.
These are all text files, effectively fragments of /etc/resolv.conf. So you can view them with any text viewer utility.
For example, on my home gateway system (Debian 9):
# ls /etc/resolvconf/run/interface/
eth2.dhclient eth2.ip6.dhclient lo.inet lo.named
eth2 is my external interface that gets its configuration via DHCP. The default domain and IPv4 DNS servers provided by my ISP's DHCP server are in file eth2.dhclient. The file eth2.ip6.dhclient has the same information for IPv6. lo.inet contains the domain search line I've set locally, and it overrides the default domain set by the ISP. And since I run a local BIND for my private home DNS domain, once BIND has started up, Debian's systemd configuration for it will optionally add a nameserver 127.0.0.1 line as lo.named.
Since /etc/resolvconf/interface-order file says that lo takes priority over anything else, the search line from lo.inet will always go to the real /etc/resolv.conf. If my BIND is running, it will be used as a local nameserver; but if it fails for some reason and systemd is unable to restart it, the dependencies in systemd configuration will cause the lo.named to be removed, and then nameserver 127.0.0.1 in /etc/resolv.conf will be automatically replaced by ISP's nameservers.
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
add a comment |Â
up vote
2
down vote
up vote
2
down vote
ls /etc/resolvconf/run/interface
will list all the pieces of nameserver information that have been added to resolvconf database. Their names will usually identify the interface to which they're associated, and possibly other things.
These are all text files, effectively fragments of /etc/resolv.conf. So you can view them with any text viewer utility.
For example, on my home gateway system (Debian 9):
# ls /etc/resolvconf/run/interface/
eth2.dhclient eth2.ip6.dhclient lo.inet lo.named
eth2 is my external interface that gets its configuration via DHCP. The default domain and IPv4 DNS servers provided by my ISP's DHCP server are in file eth2.dhclient. The file eth2.ip6.dhclient has the same information for IPv6. lo.inet contains the domain search line I've set locally, and it overrides the default domain set by the ISP. And since I run a local BIND for my private home DNS domain, once BIND has started up, Debian's systemd configuration for it will optionally add a nameserver 127.0.0.1 line as lo.named.
Since /etc/resolvconf/interface-order file says that lo takes priority over anything else, the search line from lo.inet will always go to the real /etc/resolv.conf. If my BIND is running, it will be used as a local nameserver; but if it fails for some reason and systemd is unable to restart it, the dependencies in systemd configuration will cause the lo.named to be removed, and then nameserver 127.0.0.1 in /etc/resolv.conf will be automatically replaced by ISP's nameservers.
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
ls /etc/resolvconf/run/interface
will list all the pieces of nameserver information that have been added to resolvconf database. Their names will usually identify the interface to which they're associated, and possibly other things.
These are all text files, effectively fragments of /etc/resolv.conf. So you can view them with any text viewer utility.
For example, on my home gateway system (Debian 9):
# ls /etc/resolvconf/run/interface/
eth2.dhclient eth2.ip6.dhclient lo.inet lo.named
eth2 is my external interface that gets its configuration via DHCP. The default domain and IPv4 DNS servers provided by my ISP's DHCP server are in file eth2.dhclient. The file eth2.ip6.dhclient has the same information for IPv6. lo.inet contains the domain search line I've set locally, and it overrides the default domain set by the ISP. And since I run a local BIND for my private home DNS domain, once BIND has started up, Debian's systemd configuration for it will optionally add a nameserver 127.0.0.1 line as lo.named.
Since /etc/resolvconf/interface-order file says that lo takes priority over anything else, the search line from lo.inet will always go to the real /etc/resolv.conf. If my BIND is running, it will be used as a local nameserver; but if it fails for some reason and systemd is unable to restart it, the dependencies in systemd configuration will cause the lo.named to be removed, and then nameserver 127.0.0.1 in /etc/resolv.conf will be automatically replaced by ISP's nameservers.
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
answered Dec 23 '17 at 17:05
telcoM
10.8k11232
10.8k11232
add a comment |Â
add a comment |Â
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