I'm trying to ascertain what APT::Default-Release can do for me, and what it constrains. In the output that follows, why does APT::Default-Release prevent firefox from being upgraded?
I comment out the APT::Default-Release line and repeat after the ##########. The necessary packages are in apt-cacher-ng's cache all the time. # cat /etc/apt/apt.conf # Fetch updates through apt-cacher-ng. Acquire::http::Proxy "http://192.168.1.17:3142/";; APT::Default-Release "stretch"; # # apt-cache policy firefox-esr firefox-esr: Installed: 60.6.1esr-1~deb9u1 Candidate: 60.6.1esr-1~deb9u1 Version table: 60.6.2esr-1~deb9u1 500 500 http://ftp.us.debian.org/debian stretch-updates/main amd64 Packages *** 60.6.1esr-1~deb9u1 990 990 http://ftp.us.debian.org/debian stretch/main amd64 Packages 990 http://security.debian.org/debian-security stretch/updates/main amd64 Packages 100 /var/lib/dpkg/status # # apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. # ############################################################# # cat /etc/apt/apt.conf # Fetch updates through apt-cacher-ng. Acquire::http::Proxy "http://192.168.1.17:3142/";; ##APT::Default-Release "stretch"; # # apt-cache policy firefox-esr firefox-esr: Installed: 60.6.1esr-1~deb9u1 Candidate: 60.6.2esr-1~deb9u1 Version table: 60.6.2esr-1~deb9u1 500 500 http://ftp.us.debian.org/debian stretch-updates/main amd64 Packages *** 60.6.1esr-1~deb9u1 500 500 http://ftp.us.debian.org/debian stretch/main amd64 Packages 500 http://security.debian.org/debian-security stretch/updates/main amd64 Packages 100 /var/lib/dpkg/status # # apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages will be upgraded: firefox-esr firefox-esr-l10n-en-gb 2 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 43.0 MB of archives. After this operation, 3,072 B of additional disk space will be used. Do you want to continue? [Y/n] ^C # # cd /var/cache/apt-cacher-ng/debrep/pool/main/f/firefox-esr/ # ls -l *6.2*b ; cd -rw-r--r-- 1 apt-cacher-ng apt-cacher-ng 42433100 May 6 12:00 firefox-esr_60.6.2esr-1~deb9u1_amd64.deb -rw-r--r-- 1 apt-cacher-ng apt-cacher-ng 520268 May 6 12:00 firefox-esr-l10n-en-gb_60.6.2esr-1~deb9u1_all.deb # Cheers, David.
