sed - Replace string with file contents

Shell Programming and Scripting
1

Hello,

I have two files: file1 and file2

file1 has the following info:

---
  host: "localhost"
  port: 3000
  reporter_type: "zookeeper"
  zk_hosts: 
    - "localhost:2181"

file2 contains an IP address (1.1.1.1)

What I want to do is replace localhost with 1.1.1.1, so that the end result is:

---
  host: "1.1.1.1"
  port: 3000
  reporter_type: "zookeeper"
  zk_hosts: 
    - "1.1.1.1:2181"

I have tried:

sed -i -e "/localhost/r file2" -e "/localhost/d" file1
sed '/localhost/r file2' file1 |sed '/localhost/d'
sed -e '/localhost/r file2' -e "s///" file1

but I either get the whole line replaced, or the ip going to the line after the one I need to modify.

Have spent around 4 hours searching various forums, with no luck whatsoever.

Please advise.

Thank you!

2

If the file2 contains only IP address

awk 'NR==FNR {ip=$0;next} {gsub("localhost",ip)}1 ' file2 file1

Another way

read ip < file2
sed "s/localhost/$ip/" file1

Btw, you need to be a better googler :stuck_out_tongue:

3

And what is "ip" in this case? The name of the file?

Don't get it

And btw it will always be different on every execution, so adding it as a variable won't work. I am specifically looking for a SED (or awk) method

4

As you said, your file2 contains the ip address. file1 is the text where you have the localhost string. file1 and file2 in my solution are the filenames.

5

Oh, the second one works great, thanks a lot!