Linux/bash: How to get interface's IPv6 address?
What command can I use to get IPv6 address of an interface in a script?
Update: Output of sed from one of answers.
$ ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::224:d7ff:fed0:4f5c/64 scope link
valid_lft forever preferred_lft forever
The other:
$ ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
$ ip addr show dev eth0
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether f0:de:f1:7b:e9:6c brd ff:ff:ff:ff:ff:ff
linux bash ipv6
edited Apr 10 '13 at 16:07
MoonSire
8161825
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
add a comment |
What command can I use to get IPv6 address of an interface in a script?
Update: Output of sed from one of answers.
$ ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::224:d7ff:fed0:4f5c/64 scope link
valid_lft forever preferred_lft forever
The other:
$ ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
$ ip addr show dev eth0
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether f0:de:f1:7b:e9:6c brd ff:ff:ff:ff:ff:ff
linux bash ipv6
edited Apr 10 '13 at 16:07
MoonSire
8161825
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
Which IPv6 addresses? Your interfaces' IPv6 addresses?
– m0skit0
Feb 14 '12 at 13:27
Yes, edited, thx.
– Ondra Žižka
Feb 21 '12 at 4:33
add a comment |
What command can I use to get IPv6 address of an interface in a script?
Update: Output of sed from one of answers.
$ ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::224:d7ff:fed0:4f5c/64 scope link
valid_lft forever preferred_lft forever
The other:
$ ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
$ ip addr show dev eth0
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether f0:de:f1:7b:e9:6c brd ff:ff:ff:ff:ff:ff
linux bash ipv6
edited Apr 10 '13 at 16:07
MoonSire
8161825
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
What command can I use to get IPv6 address of an interface in a script?
Update: Output of sed from one of answers.
$ ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::224:d7ff:fed0:4f5c/64 scope link
valid_lft forever preferred_lft forever
The other:
$ ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
$ ip addr show dev eth0
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether f0:de:f1:7b:e9:6c brd ff:ff:ff:ff:ff:ff
linux bash ipv6
linux bash ipv6
edited Apr 10 '13 at 16:07
MoonSire
8161825
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
edited Apr 10 '13 at 16:07
MoonSire
8161825
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
edited Apr 10 '13 at 16:07
MoonSire
8161825
edited Apr 10 '13 at 16:07
MoonSire
8161825
edited Apr 10 '13 at 16:07
MoonSire
8161825
8161825
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
asked Feb 14 '12 at 13:13
Ondra ŽižkaOndra Žižka
3792721
3792721
Which IPv6 addresses? Your interfaces' IPv6 addresses?
– m0skit0
Feb 14 '12 at 13:27
Yes, edited, thx.
– Ondra Žižka
Feb 21 '12 at 4:33
add a comment |
Which IPv6 addresses? Your interfaces' IPv6 addresses?
– m0skit0
Feb 14 '12 at 13:27
Yes, edited, thx.
– Ondra Žižka
Feb 21 '12 at 4:33
Which IPv6 addresses? Your interfaces' IPv6 addresses?
– m0skit0
Feb 14 '12 at 13:27
Which IPv6 addresses? Your interfaces' IPv6 addresses?
– m0skit0
Feb 14 '12 at 13:27
Yes, edited, thx.
– Ondra Žižka
Feb 21 '12 at 4:33
Yes, edited, thx.
– Ondra Žižka
Feb 21 '12 at 4:33
add a comment |
3 Answers
3
active
oldest
votes
You could use:
ip -6 addr
It will return all the IPv6 adresses you have configured.
answered Feb 14 '12 at 13:22
RobertRobert
7711411
add a comment |
There are lots of ways you could do this.
Here is one:
ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
It is similar to Robert's answer, except strips out the address only.
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
add a comment |
In the brave new world of SystemD, interface naming conventions have changed drastically . So when provisioning a new host, you might not be able to predict what the interface is called which could break scripts hard-coding eth0 as the IF name.
My solution shown below isn't interface name-centric: it will extract the IPv6 Global Unicast Address it finds, whatever the interface is called. The IF could be wired or wireless and my expression will work. Just set it as a variable in your script and Bob's your uncle:
IPV6GLOBALUNICAST="$(ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1)"
Just paste the following into the cli to validate it does what it says on the tin and "just works" before whacking it into your scripts:
ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1
I'm using this with great success and hasn't failed in any circumstances to date. HTH- Terrence Houlahan
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
You could use:
ip -6 addr
It will return all the IPv6 adresses you have configured.
answered Feb 14 '12 at 13:22
RobertRobert
7711411
add a comment |
You could use:
ip -6 addr
It will return all the IPv6 adresses you have configured.
answered Feb 14 '12 at 13:22
RobertRobert
7711411
add a comment |
You could use:
ip -6 addr
It will return all the IPv6 adresses you have configured.
answered Feb 14 '12 at 13:22
RobertRobert
7711411
You could use:
ip -6 addr
It will return all the IPv6 adresses you have configured.
answered Feb 14 '12 at 13:22
RobertRobert
7711411
answered Feb 14 '12 at 13:22
RobertRobert
7711411
answered Feb 14 '12 at 13:22
RobertRobert
7711411
answered Feb 14 '12 at 13:22
RobertRobert
7711411
7711411
add a comment |
add a comment |
There are lots of ways you could do this.
Here is one:
ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
It is similar to Robert's answer, except strips out the address only.
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
add a comment |
There are lots of ways you could do this.
Here is one:
ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
It is similar to Robert's answer, except strips out the address only.
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
add a comment |
There are lots of ways you could do this.
Here is one:
ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
It is similar to Robert's answer, except strips out the address only.
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
There are lots of ways you could do this.
Here is one:
ip addr show dev eth0 | sed -e's/^.*inet6 ([^ ]*)/.*$/1/;t;d'
It is similar to Robert's answer, except strips out the address only.
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
answered Feb 14 '12 at 13:25
PaulPaul
48.5k14122149
48.5k14122149
add a comment |
add a comment |
In the brave new world of SystemD, interface naming conventions have changed drastically . So when provisioning a new host, you might not be able to predict what the interface is called which could break scripts hard-coding eth0 as the IF name.
My solution shown below isn't interface name-centric: it will extract the IPv6 Global Unicast Address it finds, whatever the interface is called. The IF could be wired or wireless and my expression will work. Just set it as a variable in your script and Bob's your uncle:
IPV6GLOBALUNICAST="$(ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1)"
Just paste the following into the cli to validate it does what it says on the tin and "just works" before whacking it into your scripts:
ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1
I'm using this with great success and hasn't failed in any circumstances to date. HTH- Terrence Houlahan
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
add a comment |
In the brave new world of SystemD, interface naming conventions have changed drastically . So when provisioning a new host, you might not be able to predict what the interface is called which could break scripts hard-coding eth0 as the IF name.
My solution shown below isn't interface name-centric: it will extract the IPv6 Global Unicast Address it finds, whatever the interface is called. The IF could be wired or wireless and my expression will work. Just set it as a variable in your script and Bob's your uncle:
IPV6GLOBALUNICAST="$(ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1)"
Just paste the following into the cli to validate it does what it says on the tin and "just works" before whacking it into your scripts:
ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1
I'm using this with great success and hasn't failed in any circumstances to date. HTH- Terrence Houlahan
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
add a comment |
In the brave new world of SystemD, interface naming conventions have changed drastically . So when provisioning a new host, you might not be able to predict what the interface is called which could break scripts hard-coding eth0 as the IF name.
My solution shown below isn't interface name-centric: it will extract the IPv6 Global Unicast Address it finds, whatever the interface is called. The IF could be wired or wireless and my expression will work. Just set it as a variable in your script and Bob's your uncle:
IPV6GLOBALUNICAST="$(ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1)"
Just paste the following into the cli to validate it does what it says on the tin and "just works" before whacking it into your scripts:
ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1
I'm using this with great success and hasn't failed in any circumstances to date. HTH- Terrence Houlahan
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
In the brave new world of SystemD, interface naming conventions have changed drastically . So when provisioning a new host, you might not be able to predict what the interface is called which could break scripts hard-coding eth0 as the IF name.
My solution shown below isn't interface name-centric: it will extract the IPv6 Global Unicast Address it finds, whatever the interface is called. The IF could be wired or wireless and my expression will work. Just set it as a variable in your script and Bob's your uncle:
IPV6GLOBALUNICAST="$(ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1)"
Just paste the following into the cli to validate it does what it says on the tin and "just works" before whacking it into your scripts:
ip -6 addr|awk '{print $2}'|grep -P '^(?!fe80)[[:alnum:]]{4}:.*/64'|cut -d '/' -f1
I'm using this with great success and hasn't failed in any circumstances to date. HTH- Terrence Houlahan
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
edited Feb 7 at 9:38
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
answered Feb 7 at 9:07
F1LinuxF1Linux
1114
1114
add a comment |
add a comment |
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Which IPv6 addresses? Your interfaces' IPv6 addresses?
– m0skit0
Feb 14 '12 at 13:27
Yes, edited, thx.
– Ondra Žižka
Feb 21 '12 at 4:33