http://www.perlmonks.org?node_id=410072


in reply to help me on seek and tell function

Discover perlfaq. Specifically from perlfaq5 read How do I change one line in a file/delete a line in a file/insert a line in the middle of a file/append to the beginning of a file?

Inplace editing may be what you want.

perl -pi.bak -e 's/this string/that string/g' some.file

cheers

tachyon