You mean this?

find -name '*.p[lm]' -print0 | xargs -r0 cat | wc -l

[download]

:-)

Update: I was using the unnecessarily longwinded find \( -name '*.pm' -o -name '*.pl' \)

Update: to make this output the number of files, the easiest approach is a bit of Perl:

find -name '*.p[lm]' -print0 \
| perl -00000pe'++$a;END{print STDERR "Files: ",$a||0,", lines: "}' \
| xargs -r0 cat | wc -l

[download]

Makeshifts last the longest.

In reply to Re: Count file lines in a directory tree by Aristotle
in thread Count file lines in a directory tree by GrandFather

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