How to use GREP/FIND to search a string in all the subdirectories and files

[denevge]

use

find / -type f -exec grep -l "IP" {} \;

why ?

find / -type f -> find all files starting from /
find .... -exec -> for each item found, do the following command. Where you normally place the filename in you command, put {} .
grep -l "IP" something -> returns the filename if string "IP" is found in file something

Hope this helps
Gert