bash脚本将ip地址插入属性文件

Question

I have a property file with an entry such as this:

some.url={ipaddress}/blah

I want to substitute the {ipaddress} with the ip of machine its running on.

I found this command:

ipconfig getifaddr en0

which outputs the ip.

I also found sed is useful for this sort of thing but I can't quite put it all together.

sed -i '' 's/{ipaddress}/192.168.0.1/g' test.properties

Where the hard-coded ip address 192.168.0.1 needs to be substituted for the machine's one.

Can anyone help?

Answer 1

You can store the result of the ipconfig command in a variable like this:

ip=$(ipconfig getifaddr en0)

Then interpolate it into your sed command by surrounding the expression with double-quotes:

sed -i "" "s/{ipaddress}/$ip/g" test.properties

Answer 2

Try this:

cat file
some.url=10.10.10.5/blah

awk -F"=|/" '{print $1 "=" ip "/" $3}' ip=$(ip route get 8.8.8.8 | awk '{print $NF;exit}') file
some.url=192.168.1.30/blah

ip route get 8.8.8.8 | awk '{print $NF;exit}' ip route get 8.8.8.8 | awk '{print $NF;exit}' is one of the best way I have found to get correct IP. It works even on VPS servers and on servers with multiple IP