Installing Hermes from repository # To see Hermes-core working, you need to perform the following actions. Hermes-core is available for the following versions of operating systems: *.deb: Debian: Wheezy, Jessie, Stretch; Ubuntu: Trusty Tahr, Xenial Xerus, Yakkety Yak, Zesty Zapus. *.rpm: CentOS: 7. Installing for Debian / Ubuntu # Import the public key used by Cossack Labs to sign packages: wget -qO - https://pkgs.