how to extract just the IP address from a DNS query
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0
down vote
favorite
I'd like to know how to extract just the IP address from a DNS / dig query. The query I'm running looks like this:
lab-1:/var/# dig +answer smtp.mydomain.net +short
smtp.ggs.mydomain.net
10.11.11.11
I'd like to be able to get just the IP address returned.
I'm currently playing around with the bash pipe and the awk command. But so far, nothing I've tried is working.
Thanks.
bash dns dig
asked Feb 26 at 14:14
dot
2531310
 |Â
show 1 more comment
up vote
0
down vote
favorite
I'd like to know how to extract just the IP address from a DNS / dig query. The query I'm running looks like this:
lab-1:/var/# dig +answer smtp.mydomain.net +short
smtp.ggs.mydomain.net
10.11.11.11
I'd like to be able to get just the IP address returned.
I'm currently playing around with the bash pipe and the awk command. But so far, nothing I've tried is working.
Thanks.
bash dns dig
asked Feb 26 at 14:14
dot
2531310
4
drop+answeruse just+short
– man0v
Feb 26 at 14:16
that doesn't work. still gives me the same results @man0v
– dot
Feb 26 at 14:18
weird, it works for me oncentos.. wonder what version ofdigyou are using? What distro(or os)?
– man0v
Feb 26 at 14:19
1
@dot post dig version too. Usedig -v
– Patrick
Feb 26 at 14:26
1
Is smtp.mydomain.net an alias for smtp.ggs.mydomain.net?
– ctx
Feb 26 at 14:31
 |Â
show 1 more comment
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'd like to know how to extract just the IP address from a DNS / dig query. The query I'm running looks like this:
lab-1:/var/# dig +answer smtp.mydomain.net +short
smtp.ggs.mydomain.net
10.11.11.11
I'd like to be able to get just the IP address returned.
I'm currently playing around with the bash pipe and the awk command. But so far, nothing I've tried is working.
Thanks.
bash dns dig
asked Feb 26 at 14:14
dot
2531310
I'd like to know how to extract just the IP address from a DNS / dig query. The query I'm running looks like this:
lab-1:/var/# dig +answer smtp.mydomain.net +short
smtp.ggs.mydomain.net
10.11.11.11
I'd like to be able to get just the IP address returned.
I'm currently playing around with the bash pipe and the awk command. But so far, nothing I've tried is working.
Thanks.
bash dns dig
asked Feb 26 at 14:14
dot
2531310
asked Feb 26 at 14:14
dot
2531310
asked Feb 26 at 14:14
dot
2531310
asked Feb 26 at 14:14
dot
2531310
2531310
4
drop+answeruse just+short
– man0v
Feb 26 at 14:16
that doesn't work. still gives me the same results @man0v
– dot
Feb 26 at 14:18
weird, it works for me oncentos.. wonder what version ofdigyou are using? What distro(or os)?
– man0v
Feb 26 at 14:19
1
@dot post dig version too. Usedig -v
– Patrick
Feb 26 at 14:26
1
Is smtp.mydomain.net an alias for smtp.ggs.mydomain.net?
– ctx
Feb 26 at 14:31
 |Â
show 1 more comment
4
drop+answeruse just+short
– man0v
Feb 26 at 14:16
that doesn't work. still gives me the same results @man0v
– dot
Feb 26 at 14:18
weird, it works for me oncentos.. wonder what version ofdigyou are using? What distro(or os)?
– man0v
Feb 26 at 14:19
1
@dot post dig version too. Usedig -v
– Patrick
Feb 26 at 14:26
1
Is smtp.mydomain.net an alias for smtp.ggs.mydomain.net?
– ctx
Feb 26 at 14:31
4
4
drop
+answer use just +short– man0v
Feb 26 at 14:16
drop
+answer use just +short– man0v
Feb 26 at 14:16
that doesn't work. still gives me the same results @man0v
– dot
Feb 26 at 14:18
that doesn't work. still gives me the same results @man0v
– dot
Feb 26 at 14:18
weird, it works for me on
centos.. wonder what version of dig you are using? What distro(or os)?– man0v
Feb 26 at 14:19
weird, it works for me on
centos.. wonder what version of dig you are using? What distro(or os)?– man0v
Feb 26 at 14:19
1
1
@dot post dig version too. Use
dig -v– Patrick
Feb 26 at 14:26
@dot post dig version too. Use
dig -v– Patrick
Feb 26 at 14:26
1
1
Is smtp.mydomain.net an alias for smtp.ggs.mydomain.net?
– ctx
Feb 26 at 14:31
Is smtp.mydomain.net an alias for smtp.ggs.mydomain.net?
– ctx
Feb 26 at 14:31
 |Â
show 1 more comment
2 Answers
2
active
oldest
votes
up vote
1
down vote
accepted
I believe dig +short outputs two lines for you because the domain
you query, smtp.mydomain.net is a CNAME for smtp.ggs.mydomain.net,
and dig prints the intermediate resolution step.
You can probably rely on the last line from dig's output being the IP
you want, though, and therefore the following should do:
dig +short smtp.mydomain.net | tail -n1
answered Feb 26 at 14:38
dhag
10.7k32642
add a comment |Â
up vote
1
down vote
@dhag's answer sounds good; if you do not want to “rely on the last line from dig's output being the IP†you can use grep to extract just the numerical IP address:
dig +short smtp.mydomain.net | grep '^[.0-9]*$'
answered Feb 26 at 16:16
Renardo
862
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
I believe dig +short outputs two lines for you because the domain
you query, smtp.mydomain.net is a CNAME for smtp.ggs.mydomain.net,
and dig prints the intermediate resolution step.
You can probably rely on the last line from dig's output being the IP
you want, though, and therefore the following should do:
dig +short smtp.mydomain.net | tail -n1
answered Feb 26 at 14:38
dhag
10.7k32642
add a comment |Â
up vote
1
down vote
accepted
I believe dig +short outputs two lines for you because the domain
you query, smtp.mydomain.net is a CNAME for smtp.ggs.mydomain.net,
and dig prints the intermediate resolution step.
You can probably rely on the last line from dig's output being the IP
you want, though, and therefore the following should do:
dig +short smtp.mydomain.net | tail -n1
answered Feb 26 at 14:38
dhag
10.7k32642
add a comment |Â
up vote
1
down vote
accepted
up vote
1
down vote
accepted
I believe dig +short outputs two lines for you because the domain
you query, smtp.mydomain.net is a CNAME for smtp.ggs.mydomain.net,
and dig prints the intermediate resolution step.
You can probably rely on the last line from dig's output being the IP
you want, though, and therefore the following should do:
dig +short smtp.mydomain.net | tail -n1
answered Feb 26 at 14:38
dhag
10.7k32642
I believe dig +short outputs two lines for you because the domain
you query, smtp.mydomain.net is a CNAME for smtp.ggs.mydomain.net,
and dig prints the intermediate resolution step.
You can probably rely on the last line from dig's output being the IP
you want, though, and therefore the following should do:
dig +short smtp.mydomain.net | tail -n1
answered Feb 26 at 14:38
dhag
10.7k32642
answered Feb 26 at 14:38
dhag
10.7k32642
answered Feb 26 at 14:38
dhag
10.7k32642
answered Feb 26 at 14:38
dhag
10.7k32642
10.7k32642
add a comment |Â
add a comment |Â
up vote
1
down vote
@dhag's answer sounds good; if you do not want to “rely on the last line from dig's output being the IP†you can use grep to extract just the numerical IP address:
dig +short smtp.mydomain.net | grep '^[.0-9]*$'
answered Feb 26 at 16:16
Renardo
862
add a comment |Â
up vote
1
down vote
@dhag's answer sounds good; if you do not want to “rely on the last line from dig's output being the IP†you can use grep to extract just the numerical IP address:
dig +short smtp.mydomain.net | grep '^[.0-9]*$'
answered Feb 26 at 16:16
Renardo
862
add a comment |Â
up vote
1
down vote
up vote
1
down vote
@dhag's answer sounds good; if you do not want to “rely on the last line from dig's output being the IP†you can use grep to extract just the numerical IP address:
dig +short smtp.mydomain.net | grep '^[.0-9]*$'
answered Feb 26 at 16:16
Renardo
862
@dhag's answer sounds good; if you do not want to “rely on the last line from dig's output being the IP†you can use grep to extract just the numerical IP address:
dig +short smtp.mydomain.net | grep '^[.0-9]*$'
answered Feb 26 at 16:16
Renardo
862
answered Feb 26 at 16:16
Renardo
862
answered Feb 26 at 16:16
Renardo
862
answered Feb 26 at 16:16
Renardo
862
862
add a comment |Â
add a comment |Â
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4
drop
+answeruse just+short– man0v
Feb 26 at 14:16
that doesn't work. still gives me the same results @man0v
– dot
Feb 26 at 14:18
weird, it works for me on
centos.. wonder what version ofdigyou are using? What distro(or os)?– man0v
Feb 26 at 14:19
1
@dot post dig version too. Use
dig -v– Patrick
Feb 26 at 14:26
1
Is smtp.mydomain.net an alias for smtp.ggs.mydomain.net?
– ctx
Feb 26 at 14:31