curl --trace-ascii debugdump.txt http://www.example.com/
# save output as file
curl -o filename.html http://www.example.com/
# follow redirect
curl -L yahoo.com
# Put request with header
curl -b cookie.txt \
-X PUT \
# @test.png is a variable
--data-binary "@test.png" \
-H "Content-Type: image/png" \
$URL \
-O