command to search all files in folders and sub folders for a series of strings
I want to look for a series of strings in a set of files and i'm not used to using the command line. In other words I want to look for 'term1' or 'term2' in all the files in a directory and its sub directory. I'd like to pipe the results into a text file too.
I havent used limux for ages so I don't know whether to use find or grep or awk.