SimLab Desktop 0.1.25 Linux signatures Signing identity: SimLab Science Release Signing (Linux desktop releases) Fingerprint: 41D28009FF5C9332C9C97CC939639F36408B833C These are publisher OpenPGP signatures. They establish that these files were signed by the holder of the key above; they are not operating-system certification or a third-party identity endorsement. Confirm the fingerprint at https://simlabscience.com/desktop/ before trusting this key. Download the installer, its matching .asc file, and SimLab-Release-Signing-Key.asc. With GnuPG installed, run: gpg --show-keys --with-fingerprint SimLab-Release-Signing-Key.asc gpg --import SimLab-Release-Signing-Key.asc gpg --verify Linux-64bit-SimLab-Desktop-0.1.25.AppImage.asc Linux-64bit-SimLab-Desktop-0.1.25.AppImage or: gpg --verify Linux-Debian-Ubuntu-64bit-SimLab-Desktop-0.1.25.deb.asc Linux-Debian-Ubuntu-64bit-SimLab-Desktop-0.1.25.deb GnuPG must report a good signature from the fingerprint above. A message that the key is not certified by a trusted signature is expected for a newly imported publisher key. It is different from a bad signature. Do not install if verification fails. The separately signed SHA256SUMS-0.1.25-linux-x64.txt covers both Linux installers. gpg --verify SHA256SUMS-0.1.25-linux-x64.txt.asc SHA256SUMS-0.1.25-linux-x64.txt sha256sum --check SHA256SUMS-0.1.25-linux-x64.txt The checksum command expects both installer files to be present.