# Allows all:
User-agent: *
Disallow:

# Disallow all (you don't want ANY site traffic here...):
User-agent: *
Disallow: /

# Disallow specific files and folders
User-agent: *
Disallow: /topsy/
Disallow: /crets/
Disallow: /hidden/file.html

# Disallow Specific Bots
User-agent: Bingbot
Disallow: /

User-agent: *
Disallow: