Find all files containing a text string on Linux.

find-using-grep.md

grep -Ril "text-to-find-here" "directory path"

• i stands for upper/lower case (optional in your case).
• R stands for recursive.
• l stands for "show the file name, not the result itself`.

grep -rnw 'directory' -e "pattern" # this works for me all the time.

• r is recursive
• n is line number
• w stands match the whole word

grep --include=*.{c,h} -rnw 'directory' -e "pattern"

• This will only search through the files which have .c or .h extensions. Similarly a sample use of --exclude:

grep --exclude=*.o -rnw 'directory' -e "pattern"

• Above will exclude searching all the files ending with .o extension.

grep -Ir --exclude=*.{c,h} "pattern" *

• -I Ignores binary files

Sources

Stackoverflow article