Find files containing specific text.txt

https://stackoverflow.com/questions/16956810/how-can-i-find-all-files-containing-a-specific-text-string-on-linux


grep -Rnw '/usr/lib/clang/14.0.0/include' -e 'namespace\ std'

# -s to suppress error messages
grep -Rnws '/' -e 'hello world'