Yes you can freeze linguica.
You can freeze linguica and the linguica will keep in the freezer for up to a year.
Although after 6 months in the freezer the Linguica loses it's freshness, taste and quality.
But the Linguica will be okay to eat a year or even longer later.
But it's best to eat the Linguica as soon as possible.
I've kept Linguica in the freezer for up to 2 years and it was okay and safe to eat.
Although it was not as fresh or tasty as it would have been had I used it or eaten within a few months or so.
Meats can keep quite a long time in the freezer but only about 3 days in the refrigerator.