Find text in files

[RobinVossen]

Hey, how can I find a specific text in any file on my system?
Ive tryed this Bash Line (script)
su root -c "time grep "find / "|cowsay"
And Ive even tryed it without the Fancy Cow
su root -c "time grep "find / ""
Ah, well let me just drop down everything Ive tryed:

su root -c "time grep "find / "|cowsay"
su root -c "time grep "find / "
grep "find / "
grep "find / *"
grep | find / *
find / * grep

Oh, now I might thought of something

#!bin/bash

find / >> TempListofFiles
grep cat TempListofFiles
rm TempListofFiles

Damn doens work either :/

Well, how to do this?
Since Ive spread one file all over the place and I need to remove them all -.-'

Thanks,
Robin

[vsemaska]

To check every file on the system:

find / -type f -exec grep -l "text to look for" {} \;

[ghostdog74]

To check every file on the system:

find / -type f -exec grep -l "text to look for" {} \;

its faster to use xargs

find / -type f -print0 | xargs -0 grep -l "test"