Options

-o <file>    # --output: write to file
-u user:pass # --user: authentication

-v   # --verbose: Make curl verbose during operation
-vv  # more verbose
-s   # --silent: don't show progress meter or errors
-S   # --show-error: When used with --silent (-sS), show errors but no progress meter

-i  # --include: include HTTP headers in the output
-I  # --head: header only