Install the prerequisites:sudo apt install wget gnupg ca-certificates lsb-release
Add the APT repository:echo "deb http://deb.cyberbits.eu/zeyple $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/zeyple.list
The repository is available through HTTPS as well. You may need to install apt-transport-https.
Import the signing key so APT can verify the packages authenticity:wget -O - https://deb.cyberbits.eu/0x580D9B7340D7A21A.key | sudo apt-key add -
Verify that you now have the proper key:sudo apt-key fingerprint 580D9B7340D7A21A
The output should contain the full fingerprint as follows:
pub rsa4096 2019-10-24 [SC] [expires: 2023-10-30] B2D1 F527 C3EB E95B 8EE6 F615 580D 9B73 40D7 A21A uid [ unknown] firstname.lastname@example.org
To install zeyple, run the following commands:sudo apt update && sudo apt install zeyple