[TriLUG] how to grep

[Mike Norwood]

Hi,

I need to ask a question of this wonderful and knowledgeable group.  I 
need to grep a certain number from a file, but only when it is a certain 
location on each line, for example I want to find 12345678901, but only if 
it is in position 46 through 56 on each line in the file, not if it is in 
any other position.  What is the simplest way to tell grep to only pull 
out these records and not other matches not in position 46 through 56.

Thanks in advance.

Mike Norwood

Hillsborough, NC