Grep
Search recursively through all files
Section titled “Search recursively through all files”Command searches recursively through all files under "/your/folder" and its subdirectories,
prints the filename and line number for any line containing the exact string "string",
suppresses errors for missing files, and only matches whole words.
grep -Rsnw "/your/folder" -e "string"R- Recursively search all files under the specified directory and its subdirectories.s- Suppress error messages for nonexistent or unreadable files.n- Print the line number where the match was found.w- Only match whole words, not strings contained in larger words.