Yes; you're correct about the "highly skilled" part. I should edit the point. I'm a highly experienced generalist as opposed to a highly skilled one.
You're also correct about the fact that I do have a few specialties, including Linux and Perl. I'm pretty good at a number of languages, but Perl has been a favorite for 20 years.
Perl is friendly and fierce Perl all problems shall pierce Perl is the duct tape That holds together all things Of Perl we sings
Perl is all things beautiful and bright Perl is a magical sight Perl each day and each night
:P
Site reliability engineering could be an option: fixing other people's code to work and run cheaper at scale.
For devs, it's important to have a github or similar because that's your real tech resume.
Btw I use Perl 7 (Ruby)
Highlight the things you are actually very good at, put the rest as experience. It looks like you've written a lot of Perl, so you're highlight that. Highlight Linux package management. Despite what you think, these are specializations.