ag

The Silver Searcher. Like ack, but aims to be faster. More information: https://github.com/ggreer/the_silver_searcher.

• Find files containing "foo", and print the line matches in context:

ag foo

• Find files containing "foo" in a specific directory:

ag foo path/to/directory

• Find files containing "foo", but only [l]ist the filenames:

ag -l foo

• Find files containing "FOO" case-[i]nsensitively, and print [o]nly the match, rather than the whole line:

ag -i -o FOO

• Find "foo" in files with a name matching "bar":

ag foo -G bar

• Find files whose contents match a regular expression:

ag '^ba(r|z)$'

• Find files with a name matching "foo":

ag -g foo