In Clojure 1.3, How to read and write a file

Question

I\'d like to know the \"recommended\" way of reading and writing a file in clojure 1.3 .

1. How to read the whole file
2. How to read a file line by line

Answer 1

(require '[clojure.java.io :as io])
(io/copy (io/file "/etc/passwd") \*out*\)