Exclude Path

Hi All:
I have 4 directories:
/metalink/metalink/metalink/techb4/metalink/docs/148.87.16.107
/metalink/metalink/metalink/techb4/metalink/docs/148.87.16.108
/metalink/metalink/metalink/techb4/metalink/docs/148.87.16.109
/metalink/metalink/metalink/techb4/metalink/docs/148.87.16.120 I would like
to exclude from being indexing.  How can accomplish this?  What syntax would
I use and where? Immediate help would be greatly appreciated.

Thanks,
Leon