确定外壳中的Internet IP地址？

Question

I'm trying to save my internet IP address to a variable in the shell.

I tried

ip=`host 'localhost' | awk '{print $4}'`

But that returns

127.0.0.1

How to save internet IP address to a variable in the shell?

Answer 1

To get IP addresses of all you local interfaces, try using ifconfig , for example like this:

$ ifconfig | awk '/inet / { print $2 }'
127.0.0.1
10.8.0.34
192.168.1.2

Here you can see I have 3 addresses (the loopback adapter, ethernet and wifi). If you know your local network address has 192.* form, you can get only that one with:

$ ifconfig | awk '/inet *192/ { print $2 }'
192.168.1.2

And to store it into a variable:

ip=$(ifconfig | awk '/inet *192/ { print $2 }')

Or, to store all addresses in a bash array:

$ ips=($(ifconfig | awk '/inet / { print $2 }'))
$ printf "ip: %s\n" "${ips[@]}"
ip: 127.0.0.1
ip: 10.8.0.34
ip: 192.168.1.2

To get IPv6 addresses, look for inet6 instead of inet .