Error install openhab2

[suneethjk (Suneeth Jacob)]

Maybe below might work for you.Have a look.

APT Repo Public Key Expiration & Update

All, Our public key for the APT repos (snapshot/milestones/releases) expires today. We have just extended its validity until 2023 (thanks @theo!), but you will have to make sure that your Linux installation is aware of the new key, otherwise your will have problems when updating openHAB through apt. All you need to do execute: wget -qO - 'https://bintray.com/user/downloadSubjectPublicKey?username=openhab' | sudo apt-key add - Best regards, Kai