in Linux

Is my Linux server or desktop affected by WannaCrypt ransomware?

From my mailbag:

Dear nixCraft,

I run a Debian Linux 8.x on my Desktop and Ubuntu Linux 16.04 LTS on my Linode cloud server for my personal website. I am concerned that my Linux is affected by the recent Wannacrypt malware. I am reading about a ransomware attack, what do I need to do? Should I be worried?

–Concerned Linux User