Debian
Configuration
Network
Default networking
auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp hostname myhostname
For IPv6 DHCP:
iface eth0 inet6 dhcp
For IPv6 SLAAC:
iface eth0 inet6 auto
APT resources
Always use backports on stable
# stable-backports deb http://httpredir.debian.org/debian buster-backports main contrib non-free
Debian ansible is a little to old.
# Ansible deb http://ppa.launchpad.net/ansible/ansible/ubuntu trusty main
Signal is not in the default repo
# Signal deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main