A quick fast-track solution to install Signal IM on Kali / Debian.

# Instructions from signal.org website - confirmed to work on Kali / Debian
# NOTE need to run as root user

# 1. Install our official public software signing key

wget -O- https://updates.signal.org/desktop/apt/keys.asc | gpg --dearmor > signal-desktop-keyring.gpg

cat signal-desktop-keyring.gpg | sudo tee -a /usr/share/keyrings/signal-desktop-keyring.gpg > /dev/null

# 2. Add our repository to your list of repositories

echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] 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

Verify you get the apt repo setup

cat /etc/apt/sources.list.d/signal-xenial.list

# If this is your output, good to go

deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main

#From there, just

apt install signal-desktop

Remember that signal desktop has to be paired to you phone, using a QR code, and only one device can be paired at a time, and if you pair another, the first gets kicked off, it's a security feature :)

Happy signaling :)

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