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

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

Package: *
Pin: release a=bionic-security
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Package: openssh-client openssh-server unattended-upgrades openssh-sftp-server aptitude aptitude-common redshift redshift-gtk gtk-redshift apache2 apache2-bin apache2-data apache2-utils firefox aptitude-doc-en apache2-doc gnome-screenshot nginx-doc p7zip p7zip-full gnome-icon-theme libnautilus-extension1a pidgin pidgin-data libpurple0 pidgin-libnotify unrar-free
Pin: release n=bionic
Pin-Priority: 500