Searching with find and grep

man find tells you everything, but these are the ones we use:

command	what it does
`find . -name file_name -print`	search the current folder and below
`find ~ -name ".DS_Store" -delete`	delete .DS_Store files
`find . -type f -print \| egrep -i '\.m4a$\|\.mp3$'`	all .m4a or .mp3 files
`find . -type f -print \| egrep -i '\.m4a$\|\.mp3$' \| wc -l`	count them
`find foo -name \*.txt`	find all .txt files in foo
`grep -r pattern folder/to/search`	search through a folder
`grep "my string of text" -r`	search folders & subfolders