find all files containing specific text on Linux

find all files containing specific text on Linux

grep -rnw '/path/to/somewhere/' -e "pattern"
-r or -R is recursive,
-n is line number, and
-w stands match the whole word.
-l (lower-case L) can be added to just give the file name of matching files.
Along with these, --exclude or --include parameter could be used for efficient searching. Something like below:
grep --include=\*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"
This will only search through the files which have .c or .h extensions. 


grep -rnw '/path/to/somewhere/' -e "pattern" | wc -l #get the num of files