HOWTO: Search recursively

a)

grep -R ./

HOWTO: Combine find and grep efficiently

a)

find ./ -name "*.tex" -exec grep -qi "endnote" {} \; -print

http://ailoo.net/2008/07/mit-find-und-grep-in-dateien-suchen/

HOWTO: Search in files with given extension

a) Find all occurences of «\»

grep -rn --include *.m '\\'

b) Find all occurences of «’'»

grep -rn --include *.m \''\\''\

http://stackoverflow.com/questions/12516937/grep-but-only-certain-file-extensions