Grep Command attributes
Recursively Search a sting in current directory
grep -inr 'search-text' .
Search in specific file pattern
grep -inr --include="*txt" "search-text" .
Grep with only first 150 text of lines
grep -inr 'search-text' | cut -c 1-150
Grep multiple text in a single search
grep -e "search1" -e "search2" file.txt