Package: *
Pin: release a=bionic
Pin-Priority: -100

Package: *
Pin: release a=bionic-updates
Pin-Priority: -100

Package: *
Pin: release a=bionic-security
Pin-Priority: -100

Package: iproute2 cron thermald openssh-client openssh-server unattended-upgrades openssh-sftp-server
Pin: release n=bionic
Pin-Priority: 500