Why is fast sync not working with geth 1.1?

Question

When I run geth --fast

I get:

Incorrect Usage.

geth [global options] command [command options] [arguments...]

VERSION:
   1.1.0

[...]

flag provided but not defined: -fast

How do I fix this?

Answer 1

You need to update geth. Fast sync was implemented in version 1.3.1.