grep

Examples

grep <regexp> -r .

... match regexp recursively

grep <regexp> `find * -name '.svn' -prune -o -type f`

... match regexp recursively and ignore .svn files / dirs

export GREP_OPTIONS="--exclude-dir=.svn"

... a more elegant way to achieve the same result

grep '.\{80\}' <filename>

... match lines longer than 80 characters