This one liner

perl -i.bak -pe 's/123456/234165/' filename

[download]

will change only one occurrence of the pattern, modify your file in place and save the old one with a ".bak" extension.

To change every occurrence of the pattern, use 

s/123456/234165/g

[download]

In reply to Re: Changing file contents by rnahi
in thread Changing file contents by bh_perl

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