I left Evernote in 2014, and at the time there was no Linux native client (nor am I aware of one now).
Here is the official “Ask” Thread for Evernote for Linux:
Here are the current options for Linux users to use Evernote (besides Evernote Web):
Originally Posted: https://www.quora.com/Does-Evernote-have-a-plan-for-developing-a-Linux-version
Originally Posted On: 2015-02-16