To use the Signal desktop app, Signal must first be installed on your phone.
# NOTE: These instructions only work for 64 bit Debian-based # Linux distributions such as Ubuntu, Mint etc. # 1. Install our official public software signing key wget -O- https://updates.signal.org/desktop/apt/keys.asc |\ sudo apt-key add - # 2. Add our repository to your list of repositories echo "deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main" |\ sudo tee -a /etc/apt/sources.list.d/signal-xenial.list # 3. Update your package database and install signal sudo apt update && sudo apt install signal-desktop