Installing Acra from the repository # Debian / Ubuntu # 1. Import the public key used by Cossack Labs to sign packages: wget -qO - https://pkgs.cossacklabs.com/gpg | sudo apt-key add - Note: If you wish to validate the key fingerprint, it is: 29CF C579 AD90 8838 3E37 A8FA CE53 BCCA C8FF FACB 2. Add the Cossack Labs repository to your sources.list. You should add a line that specifies your OS name and the release name: