Question

There is a parameter that I need to grep from a file and then I need to get that parameter into another file. I need to read the variable at boot time and have it inserted in

$grep "id" /file/one | cut -d " " -f2
$12345

So now I have the ID_VAR of 12345. Now what I would like to do is use this in /file/two

In file/two:

...
@program ID_VAR
...

Is there a way to run the grep function inside file two? Is there a way to share a variable between files? I am using Debian.

Answer 1

grep an id from one file and append to another file prepended with the string @program:

echo '@program' $(grep "id" file/one | cut -d " " -f2) >> file/two