You are not a highly skilled generalist. That implies you are a master of everything. You are not because no one is. Being a master of a few things with experience with many things makes you a useful specialist. The proverbial T shaped person. This is a good thing.
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.
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
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.