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Release file you talking about is an encryption key that is used to
check if package or repository is trusted. There is a package (debian-keyring) with said keys that could be installed, so it will take care about changing keys in the future. It looks like your keyring is unreadable by unprivileged _apt user. You can fix this by typing this command as root: chmod 644 /etc/apt/trusted.gpg Here is minimum contents of "/etc/apt/sources.list" file that is required for apt-get to install packages from Internet: # deb http://ftp.us.debian.org/debian/ stretch main contrib non-free deb-src http://ftp.us.debian.org/debian/ stretch main contrib non-free # deb http://ftp.us.debian.org/debian/ stretch-updates main contrib non-free deb-src http://ftp.us.debian.org/debian/ stretch-updates main contrib non-free # deb http://security.debian.org/debian-security/ stretch/updates main contrib non-free deb-src http://security.debian.org/debian-security/ stretch/updates main contrib non-free # Check contents of this file and replace them with these lines if necessary. After that you should be fine. If not, show me output of these commands: apt-get update cat /etc/apt/sources.list On 19.10.2017 22:09, Josh W. wrote:
-- With kindest regards, Alexander. ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org ⠈⠳⣄⠀⠀⠀⠀ |