Perl: Scroll the file and replace

Question

I just want to read in the log file, search and replace, and then write the changes to the same log file.

What is the best way to do this in Perl?

Answer 1

I usually code one liner for this:

perl -i -pe 's/some/thing/' log.file 

See here

Answer 2

This is often done using a single line interface:

 perl -pi.bak -e "s/find/replace/g" <file> 

Note the -i.bak part - this creates a backup file with the extension .bak . If you want to play without a network, you can do this to overwrite an existing file without a backup:

 perl -pi -e "s/find/replace/g" <file> 

Answer 3

or you can use sed (I know ... you asked about perl):

 sed -i 's/find/replace/g' <file>