A certificate indicates that you've good knowledge of Linux. But with a certification, companies expect more from you and you've to prove your relevent knowledge.
A certificate will help you only if you've real knowledge and skills in Linux. Else, for me, it's just a piece of paper!
Anyway, I think you are a newbie in Linux, so before going for certification, you should better prepare and develope your skills in Linux for few months.
You can opt for some training or just install any Linux distro on your PC and follow some guides
, and keep practicing.