Does robots.txt work per directory or per domain?

[zver0]

Does robots.txt work per directory like .htaccess, or only on robots.txt is allowed per domain/subdomain?

[Little_G]

Hi,

Only one robots.txt is allowed in the root directory, others will be ignored.

Andrew

[Lord Majestic]

One robots.txt per domain (sub-domains considered to be unique) per port (default 80) per protocol (ie HTTP/HTTS).

It is entirely possible that one physical location on a hard drive will result in the same robots.txt being shown in all these scenarios.