Perl regex to act on a file from the command line

Question

In a file, say xyz.txt i want to replace the pattern of any number followed by a dot example:1.,2.,10.,11. etc.. with a whitespace. How to compose a perl command on the comm

Answer 1

Both

perl -ipe "s/\d+\./ /g" xyz.txt

and

perl -pie

cannot execute on my system.

I use the following order:

perl -i -pe