Security stuff
Provider, e.g.:
Install Bitmask
https://dl.bitmask.net/en/signature-verification
wget https://dl.bitmask.net/client/linux/stable/Bitmask-linux64-latest.tar.gz && xm
wget -O- dl.bitmask.net/apt.key | gpg --import
gpg --verify Bitmask-linux64-latest.tar.gz.asc